{ "license": "https://creativecommons.org/licenses/by/4.0/", "attribution": "Milkweed USA (https://milkweedusa.com), CC BY 4.0", "note": "Text and data are CC BY 4.0. Photographs carry their own licenses, listed per image on each page.", "generated": "2026-08-01", "count": 72, "species": [ { "slug": "butterfly-weed", "scientificName": "Asclepias tuberosa", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Butterfly Weed", "Butterfly Milkweed", "Orange Milkweed", "Pleurisy Root", "Chigger Flower" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "orange", "yellow", "red" ], "leafArrangement": "alternate", "leafShape": "lanceolate", "sap": "clear", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "full" ], "usdaZones": [ 3, 9 ], "stratificationDays": 30, "ratings": { "garden": 5, "monarch": 4, "nectar": 5 }, "statesRecorded": [ "AL", "AR", "AZ", "CO", "CT", "DC", "DE", "FL", "GA", "IA", "IL", "IN", "KS", "KY", "LA", "MA", "MD", "ME", "MI", "MN", "MO", "MS", "NC", "ND", "NE", "NH", "NJ", "NM", "NY", "OH", "OK", "PA", "RI", "SC", "SD", "TN", "TX", "UT", "VA", "VT", "WI", "WV", "WY" ], "summary": "The one milkweed almost everyone recognizes: flat-topped clusters of brilliant orange flowers on a stiff, hairy, knee-high clump. It is the most garden-worthy species in the genus: tidy, drought-proof, long-lived and unbothered by anything except wet soil. It is also the odd one out in the family, with alternate leaves and watery rather than milky sap.", "identification": [ "Sap is clear or barely cloudy. It is the only common North American milkweed that does not bleed white latex when a leaf is pulled.", "Leaves are alternate and stalkless, not paired opposite each other as in most milkweeds.", "Stems and leaves are noticeably rough-hairy; the whole plant feels sandpapery.", "Flowers range from yellow through pumpkin to nearly scarlet, often varying between plants in a single population." ], "url": "https://milkweedusa.com/species/butterfly-weed/", "markdown": "https://milkweedusa.com/species/butterfly-weed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_tuberosa", "title": "Asclepias tuberosa", "extract": "Asclepias tuberosa, commonly known as butterfly weed or pleurisy root, is a species of milkweed native to eastern and southwestern North America. It is commonly known as butterfly weed because of the butterflies that are attracted to the plant by its color and its copious production of nectar." }, "gbif": { "id": 3170305, "url": "https://www.gbif.org/species/3170305", "accepted": "Asclepias tuberosa L." }, "inaturalist": { "id": 47912, "url": "https://www.inaturalist.org/taxa/47912", "observations": 78396 }, "powo": { "id": "94704-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94704-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20tuberosa.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20tuberosa" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20tuberosa" } }, "photoCount": 8 }, { "slug": "common-milkweed", "scientificName": "Asclepias syriaca", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Common Milkweed", "Silkweed", "Virginia Silkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 36, 72 ], "spreadInches": [ 24, 120 ], "bloomMonths": [ 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "pink", "mauve", "white" ], "leafArrangement": "opposite", "leafShape": "oblong", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry", "medium" ], "light": [ "full", "part" ], "usdaZones": [ 3, 9 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 5, "nectar": 5 }, "statesRecorded": [ "AL", "AR", "CO", "CT", "DC", "DE", "GA", "IA", "IL", "IN", "KS", "KY", "LA", "MA", "MD", "ME", "MI", "MN", "MO", "MS", "MT", "NC", "ND", "NE", "NH", "NJ", "NY", "OH", "OK", "PA", "RI", "SC", "SD", "TN", "TX", "VA", "VT", "WI", "WV", "WY" ], "summary": "The species that feeds the eastern monarch migration. Big paddle-shaped leaves, thick stems and heavy, drooping balls of dusty-pink flowers with a scent people describe as honey and vanilla. It is also an aggressive rhizomatous colonizer: magnificent in a meadow, a menace in a perennial border.", "identification": [ "Leaves are large, broad and oblong with a prominent pale midrib, felted underneath.", "Flower clusters droop or nod rather than sitting flat on top of the stem.", "Stems are stout, usually unbranched, and covered in fine downy hair.", "Seed pods are fat, warty and covered in soft spines, unmistakable in the fall." ], "url": "https://milkweedusa.com/species/common-milkweed/", "markdown": "https://milkweedusa.com/species/common-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_syriaca", "title": "Asclepias syriaca", "extract": "Asclepias syriaca, commonly called common milkweed, butterfly flower, silkweed, silky swallow-wort, and Virginia silkweed, is a species of flowering plant. It is native to southern Canada and much of the United States east of the Rocky Mountains, excluding the drier parts of the prairies. It is in the genus Asclepias, the milkweeds. It grows in sandy soils as well as other kinds of soils in sunny " }, "gbif": { "id": 3170247, "url": "https://www.gbif.org/species/3170247", "accepted": "Asclepias syriaca L." }, "inaturalist": { "id": 47911, "url": "https://www.inaturalist.org/taxa/47911", "observations": 192150 }, "powo": { "id": "319076-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:319076-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20syriaca.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20syriaca" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20syriaca" } }, "photoCount": 8 }, { "slug": "showy-milkweed", "scientificName": "Asclepias speciosa", "authority": "Torr.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Showy Milkweed", "Greek Milkweed", "Creek Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 60 ], "spreadInches": [ 24, 96 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "pink", "rose" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "medium", "dry" ], "light": [ "full" ], "usdaZones": [ 3, 9 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 5, "nectar": 5 }, "statesRecorded": [ "AZ", "CA", "CO", "IA", "ID", "KS", "MN", "MO", "MT", "ND", "NE", "NM", "NV", "OK", "OR", "SD", "TX", "UT", "WA", "WI", "WY" ], "summary": "The West’s answer to common milkweed, and the single most important monarch host plant between the Great Plains and the Sierra Nevada. Its flowers are the showiest in the genus: star-shaped, rose-pink, with long pointed hoods that give each cluster a spiky, ornamental look. Gray-green velvety foliage sets it apart at fifty paces.", "identification": [ "Hoods are long, narrow and sharply pointed, giving the flower head a distinctly starry silhouette. This is the key difference from common milkweed.", "Leaves are thick, gray-green and densely velvety-hairy on both sides.", "Flower clusters are held upright to slightly nodding, not fully drooping.", "Pods are woolly and covered in soft, blunt projections." ], "url": "https://milkweedusa.com/species/showy-milkweed/", "markdown": "https://milkweedusa.com/species/showy-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_speciosa", "title": "Asclepias speciosa", "extract": "Asclepias speciosa is a milky-sapped perennial plant in the dogbane family (Apocynaceae), known commonly as the showy milkweed and is found in the western half of North America." }, "gbif": { "id": 3170260, "url": "https://www.gbif.org/species/3170260", "accepted": "Asclepias speciosa Torr." }, "inaturalist": { "id": 62292, "url": "https://www.inaturalist.org/taxa/62292", "observations": 36326 }, "powo": { "id": "94654-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94654-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20speciosa.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20speciosa" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20speciosa" } }, "photoCount": 8 }, { "slug": "swamp-milkweed", "scientificName": "Asclepias incarnata", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Swamp Milkweed", "Rose Milkweed", "Marsh Milkweed", "Pink Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 36, 60 ], "spreadInches": [ 24, 36 ], "bloomMonths": [ 6, 7, 8, 9 ], "peakBloomMonths": [ 7, 8 ], "flowerColors": [ "pink", "rose", "white" ], "leafArrangement": "opposite", "leafShape": "lanceolate", "sap": "milky", "rootSystem": "fibrous", "soilMoisture": [ "wet", "medium" ], "light": [ "full", "part" ], "usdaZones": [ 3, 9 ], "stratificationDays": 30, "ratings": { "garden": 5, "monarch": 5, "nectar": 5 }, "statesRecorded": [ "AL", "AR", "CO", "CT", "DC", "DE", "FL", "GA", "IA", "IL", "IN", "KS", "KY", "LA", "MA", "MD", "ME", "MI", "MN", "MO", "MS", "MT", "NC", "ND", "NE", "NH", "NJ", "NM", "NY", "OH", "OK", "PA", "RI", "SC", "SD", "TN", "TX", "UT", "VA", "VT", "WI", "WV", "WY" ], "summary": "The best-behaved milkweed there is: a tidy, clump-forming, non-running perennial with narrow willow-like leaves and domed clusters of vivid rose-pink flowers that smell faintly of cinnamon. It grows in wet ground in the wild but is perfectly happy in ordinary garden soil, which makes it the safest choice for a border.", "identification": [ "Narrow, smooth, willow-like leaves on a slender stem that branches near the top.", "Flowers are a much brighter, cleaner pink than common milkweed, in neat rounded clusters held upright.", "Pods are slim, smooth and spindle-shaped, never warty.", "Forms a discrete crown; it does not send up shoots away from the plant." ], "url": "https://milkweedusa.com/species/swamp-milkweed/", "markdown": "https://milkweedusa.com/species/swamp-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_incarnata", "title": "Asclepias incarnata", "extract": "Asclepias incarnata, the swamp milkweed, rose milkweed, rose milkflower, swamp silkweed, or white Indian hemp, is a herbaceous perennial plant species native to North America. It grows in damp through wet soils and also is cultivated as a garden plant for its flowers, which attract butterflies and other pollinators with nectar. Like most other milkweeds, it has latex containing toxic steroids, a c" }, "gbif": { "id": 3170266, "url": "https://www.gbif.org/species/3170266", "accepted": "Asclepias incarnata L." }, "inaturalist": { "id": 125381, "url": "https://www.inaturalist.org/taxa/125381", "observations": 58977 }, "powo": { "id": "94351-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94351-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20incarnata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20incarnata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20incarnata" } }, "photoCount": 8 }, { "slug": "whorled-milkweed", "scientificName": "Asclepias verticillata", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Whorled Milkweed", "Eastern Whorled Milkweed", "Horsetail Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 9, 18 ], "bloomMonths": [ 6, 7, 8, 9 ], "peakBloomMonths": [ 7, 8 ], "flowerColors": [ "white", "green" ], "leafArrangement": "whorled", "leafShape": "threadlike", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry", "medium" ], "light": [ "full" ], "usdaZones": [ 3, 9 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 4, "nectar": 4 }, "statesRecorded": [ "AL", "AR", "AZ", "CO", "CT", "DC", "DE", "FL", "GA", "IA", "IL", "IN", "KS", "KY", "LA", "MA", "MD", "MI", "MN", "MO", "MS", "MT", "NC", "ND", "NE", "NH", "NJ", "NM", "NY", "OH", "OK", "PA", "RI", "SC", "SD", "TN", "TX", "VA", "VT", "WI", "WV", "WY" ], "summary": "A wiry, fine-textured milkweed that looks more like a horsetail than an Asclepias, with needle-thin leaves in whorls up a slim stem and small greenish-white flowers late in the season. It slips into thin, poor, dry ground where nothing else will grow.", "identification": [ "Leaves are thread-fine, one to two millimeters wide, arranged in whorls of three to six around the stem.", "The whole plant is slender and grass-like until it flowers.", "Small white to greenish flowers in several small clusters along the upper stem.", "Blooms notably late, often the last milkweed still in flower." ], "url": "https://milkweedusa.com/species/whorled-milkweed/", "markdown": "https://milkweedusa.com/species/whorled-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_verticillata", "title": "Asclepias verticillata", "extract": "Asclepias verticillata, the whorled milkweed, eastern whorled milkweed, or horsetail milkweed, is a species of milkweed native to most of eastern North America and parts of western Canada and the United States." }, "gbif": { "id": 3170235, "url": "https://www.gbif.org/species/3170235", "accepted": "Asclepias verticillata L." }, "inaturalist": { "id": 125379, "url": "https://www.inaturalist.org/taxa/125379", "observations": 15289 }, "powo": { "id": "94722-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94722-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20verticillata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20verticillata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20verticillata" } }, "photoCount": 8 }, { "slug": "tropical-milkweed", "scientificName": "Asclepias curassavica", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Tropical Milkweed", "Bloodflower", "Mexican Butterfly Weed", "Scarlet Milkweed" ], "nativeToUS": false, "conservationFlag": null, "heightInches": [ 24, 48 ], "spreadInches": [ 18, 30 ], "bloomMonths": [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ], "peakBloomMonths": [ 6, 7, 8, 9 ], "flowerColors": [ "red", "orange", "yellow" ], "leafArrangement": "opposite", "leafShape": "lanceolate", "sap": "milky", "rootSystem": "fibrous", "soilMoisture": [ "medium" ], "light": [ "full", "part" ], "usdaZones": [ 8, 11 ], "stratificationDays": 0, "ratings": { "garden": 3, "monarch": 2, "nectar": 4 }, "statesRecorded": [ "AL", "AZ", "CA", "FL", "GA", "HI", "LA", "MS", "NC", "SC", "TX" ], "summary": "The scarlet-and-gold milkweed sold in nearly every garden center. It is not native to the United States, it flowers relentlessly, and in frost-free regions that is exactly the problem: it disrupts monarch migration and builds up parasite loads. Beautiful plant, genuinely bad ecological actor south of the frost line.", "identification": [ "Flowers are two-toned, a red or orange corolla with a bright yellow-orange crown, unlike any native species.", "Blooms continuously rather than in a defined season.", "Smooth, dark green lance-shaped leaves; slender upright stems; no basal woodiness in the first year.", "Pods are narrow, smooth and upright." ], "url": "https://milkweedusa.com/species/tropical-milkweed/", "markdown": "https://milkweedusa.com/species/tropical-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_curassavica", "title": "Asclepias curassavica", "extract": "Asclepias curassavica, commonly known as tropical milkweed, is a flowering plant species of the milkweed genus, Asclepias. It is native to the American tropics and has a pantropical distribution as an introduced species. Other common names include bloodflower or blood flower, cotton bush, hierba de la cucaracha, Mexican butterfly weed, redhead, scarlet milkweed, and wild ipecacuanha." }, "gbif": { "id": 3170241, "url": "https://www.gbif.org/species/3170241", "accepted": "Asclepias curassavica L." }, "inaturalist": { "id": 75602, "url": "https://www.inaturalist.org/taxa/75602", "observations": 41667 }, "powo": { "id": "94213-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94213-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20curassavica.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20curassavica" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20curassavica" } }, "photoCount": 8 }, { "slug": "narrowleaf-milkweed", "scientificName": "Asclepias fascicularis", "authority": "Decne.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Narrowleaf Milkweed", "Mexican Whorled Milkweed", "Narrow-leaved Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 48 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 6, 7, 8 ], "flowerColors": [ "white", "pink", "green" ], "leafArrangement": "whorled", "leafShape": "narrow", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry", "medium" ], "light": [ "full" ], "usdaZones": [ 6, 10 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 5, "nectar": 4 }, "statesRecorded": [ "AZ", "CA", "ID", "NV", "OR", "UT", "WA" ], "summary": "The workhorse milkweed of the Pacific states and the backbone of western monarch recovery planting. Slim whorls of narrow leaves, dense clusters of small greenish-white flowers flushed pink, and an ability to shrug off a rainless California summer.", "identification": [ "Leaves narrow and often in whorls of three to five, but wider and softer than eastern whorled milkweed.", "Flower clusters are dense and rounded, greenish-white with a dull rose tinge.", "Stems slender, usually several from one crown, smooth or nearly so.", "Widely branched at the top when growing well." ], "url": "https://milkweedusa.com/species/narrowleaf-milkweed/", "markdown": "https://milkweedusa.com/species/narrowleaf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_fascicularis", "title": "Asclepias fascicularis", "extract": "Asclepias fascicularis is a species of milkweed known by the common names narrowleaf milkweed and Mexican whorled milkweed. It is a perennial herb that grows in a variety of habitats." }, "gbif": { "id": 3170291, "url": "https://www.gbif.org/species/3170291", "accepted": "Asclepias fascicularis Decne." }, "inaturalist": { "id": 56851, "url": "https://www.inaturalist.org/taxa/56851", "observations": 19416 }, "powo": { "id": "94272-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94272-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20fascicularis.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20fascicularis" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20fascicularis" } }, "photoCount": 8 }, { "slug": "antelope-horns", "scientificName": "Asclepias asperula", "authority": "(Decne.) Woodson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Antelope Horns", "Spider Milkweed", "Green-flowered Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 24 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 3, 4, 5, 6, 7 ], "peakBloomMonths": [ 4, 5 ], "flowerColors": [ "green", "cream", "maroon" ], "leafArrangement": "alternate", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 5, 9 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 5, "nectar": 3 }, "statesRecorded": [ "AZ", "CO", "KS", "NE", "NM", "NV", "OK", "TX", "UT" ], "summary": "A low, sprawling clump of arching stems topped by softball-sized globes of green flowers with maroon centers, blooming very early on limestone and caliche soils. In Texas and New Mexico it is the plant that meets the first northbound monarchs of the year.", "identification": [ "Flowers in tight spherical clusters, pale green with dark red-purple hoods. No other milkweed in its range looks like this.", "Stems sprawl outward and curve upward rather than standing straight.", "Leaves are long, narrow and often folded lengthwise along the midrib.", "Curved, upward-pointing pods gave the plant its name." ], "url": "https://milkweedusa.com/species/antelope-horns/", "markdown": "https://milkweedusa.com/species/antelope-horns/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_asperula", "title": "Asclepias asperula", "extract": "Asclepias asperula, commonly called antelope horns milkweed or spider milkweed, is a species of milkweed native to the Southwestern United States and northern Mexico." }, "gbif": { "id": 8683730, "url": "https://www.gbif.org/species/8683730", "accepted": "Asclepias asperula (Decne.) Woodson" }, "inaturalist": { "id": 62298, "url": "https://www.inaturalist.org/taxa/62298", "observations": 31451 }, "powo": { "id": "21143-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21143-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20asperula.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20asperula" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20asperula" } }, "photoCount": 8 }, { "slug": "poison-milkweed", "scientificName": "Asclepias subverticillata", "authority": "(A. Gray) Vail", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Poison Milkweed", "Western Whorled Milkweed", "Horsetail Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 24, 96 ], "bloomMonths": [ 6, 7, 8, 9 ], "peakBloomMonths": [ 7, 8 ], "flowerColors": [ "white", "green" ], "leafArrangement": "whorled", "leafShape": "threadlike", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 4, 9 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AZ", "CO", "KS", "NE", "NM", "NV", "OK", "TX", "UT", "WY" ], "summary": "The whorled milkweed of the Southwest and southern Rockies: thin, wiry, colony-forming, and the species behind most milkweed poisoning cases in the region. Ecologically useful on wild ground, but not a plant to introduce deliberately.", "identification": [ "Very narrow leaves in whorls, with smaller leaves clustered in the axils giving a bushy, feathery look.", "Forms extensive rhizomatous colonies in disturbed sandy ground, roadsides and overgrazed pasture.", "Small greenish-white flowers in clusters along the upper stem." ], "url": "https://milkweedusa.com/species/poison-milkweed/", "markdown": "https://milkweedusa.com/species/poison-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_subverticillata", "title": "Asclepias subverticillata", "extract": "Asclepias subverticillata is a plant found in the southwestern United States and Mexico. Common names include horsetail milkweed, poison milkweed and whorled milkweed." }, "gbif": { "id": 3170284, "url": "https://www.gbif.org/species/3170284", "accepted": "Asclepias subverticillata (A.Gray) Vail" }, "inaturalist": { "id": 127159, "url": "https://www.inaturalist.org/taxa/127159", "observations": 4386 }, "powo": { "id": "21298-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21298-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20subverticillata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20subverticillata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20subverticillata" } }, "photoCount": 8 }, { "slug": "green-comet-milkweed", "scientificName": "Asclepias viridiflora", "authority": "Raf.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Green Comet Milkweed", "Green Milkweed", "Short Green Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 12, 20 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "green" ], "leafArrangement": "opposite", "leafShape": "elliptic", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 3, 9 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AL", "AR", "AZ", "CO", "CT", "DE", "FL", "GA", "IA", "IL", "IN", "KS", "KY", "LA", "MD", "MI", "MN", "MO", "MS", "MT", "NC", "ND", "NE", "NJ", "NM", "NY", "OH", "OK", "PA", "SC", "SD", "TN", "TX", "UT", "VA", "WI", "WV", "WY" ], "summary": "A subtle, wide-ranging prairie milkweed with tight ball-shaped clusters of purely green flowers pressed against the stem. Enormously variable in leaf shape across its range, from broad and wavy to narrow and folded, which makes it one of the most confusing milkweeds to key out.", "identification": [ "Flowers entirely green with no purple or white, in dense sessile or short-stalked clusters.", "Leaves thick and often with wavy margins; shape varies wildly between populations.", "Stems usually single, sometimes leaning; the whole plant is understated and easy to walk past." ], "url": "https://milkweedusa.com/species/green-comet-milkweed/", "markdown": "https://milkweedusa.com/species/green-comet-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_viridiflora", "title": "Asclepias viridiflora", "extract": "Asclepias viridiflora; also known as green comet milkweed, green-flower milkweed, and green milkweed; is a species of milkweed (Asclepias). The plant is located in the eastern and central United States, ranging between Connecticut to Georgia and Arizona to Montana, and is also in southern Canada and northern Mexico. The Latin epithet viridiflora translates as \"green-flowered\"." }, "gbif": { "id": 3170313, "url": "https://www.gbif.org/species/3170313", "accepted": "Asclepias viridiflora Raf." }, "inaturalist": { "id": 158763, "url": "https://www.inaturalist.org/taxa/158763", "observations": 13666 }, "powo": { "id": "1167930-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:1167930-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20viridiflora.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20viridiflora" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20viridiflora" } }, "photoCount": 8 }, { "slug": "plains-milkweed", "scientificName": "Asclepias pumila", "authority": "(A. Gray) Vail", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Plains Milkweed", "Low Milkweed", "Dwarf Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 4, 12 ], "spreadInches": [ 6, 18 ], "bloomMonths": [ 6, 7, 8, 9 ], "peakBloomMonths": [ 7, 8 ], "flowerColors": [ "white", "cream" ], "leafArrangement": "alternate", "leafShape": "threadlike", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 3, 8 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "CO", "KS", "MT", "ND", "NE", "NM", "OK", "SD", "TX", "WY" ], "summary": "A knee-high-at-most tuft of fine, almost dill-like foliage carrying tiny cream flowers, scattered across shortgrass prairie from Montana to the Texas Panhandle. Easily mistaken for a grass until it blooms.", "identification": [ "Rarely over a foot tall, with crowded thread-fine alternate leaves.", "Small white to cream flower clusters at the stem tips.", "Grows in dense shortgrass and on hard-packed prairie soils where taller milkweeds cannot compete." ], "url": "https://milkweedusa.com/species/plains-milkweed/", "markdown": "https://milkweedusa.com/species/plains-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 3170288, "url": "https://www.gbif.org/species/3170288", "accepted": "Asclepias pumila (A.Gray) Vail" }, "inaturalist": { "id": 158756, "url": "https://www.inaturalist.org/taxa/158756", "observations": 1021 }, "powo": { "id": "21273-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21273-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20pumila.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20pumila" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20pumila" } }, "photoCount": 8 }, { "slug": "broadleaf-milkweed", "scientificName": "Asclepias latifolia", "authority": "(Torr.) Raf.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Broadleaf Milkweed", "Corn-kernel Milkweed", "Broadleaf Milkvine" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 18, 48 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "green", "cream" ], "leafArrangement": "opposite", "leafShape": "orbicular", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 5, 9 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "AZ", "CO", "KS", "NE", "NM", "NV", "OK", "TX", "UT", "WY" ], "summary": "Thick, almost circular leaves stacked up a stout stem like a pile of green plates, with flower clusters tucked into the leaf axils. A tough, deeply rooted southern plains species that thrives where summer means 100°F and no rain.", "identification": [ "Leaves are very broad, blunt-tipped and often wider than they are long, clasping the stem closely.", "Flower clusters sit in the leaf axils rather than crowning the plant.", "Stems are stout and unbranched, giving a stiff, architectural look." ], "url": "https://milkweedusa.com/species/broadleaf-milkweed/", "markdown": "https://milkweedusa.com/species/broadleaf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_latifolia", "title": "Asclepias latifolia", "extract": "Asclepias latifolia is a species of milkweed, also known by the common name broadleaf milkweed." }, "gbif": { "id": 3170304, "url": "https://www.gbif.org/species/3170304", "accepted": "Asclepias latifolia (Torr.) Raf." }, "inaturalist": { "id": 62296, "url": "https://www.inaturalist.org/taxa/62296", "observations": 5209 }, "powo": { "id": "94386-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94386-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20latifolia.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20latifolia" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20latifolia" } }, "photoCount": 8 }, { "slug": "engelmanns-milkweed", "scientificName": "Asclepias engelmanniana", "authority": "Woodson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Engelmann’s Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 60 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 6, 7, 8 ], "peakBloomMonths": [ 7 ], "flowerColors": [ "green", "yellow" ], "leafArrangement": "alternate", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 4, 8 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "CO", "KS", "NE", "NM", "OK", "SD", "TX", "WY" ], "summary": "A tall, sparse, almost skeletal prairie milkweed with long drooping linear leaves and small greenish-yellow flowers. It looks fragile and is anything but, with a taproot that goes deep into sandy plains soil.", "identification": [ "Very long, narrow, drooping alternate leaves on a tall slender stem.", "Small greenish-yellow flowers in loose clusters from the upper leaf axils.", "Distinctly gaunt outline compared with other plains milkweeds." ], "url": "https://milkweedusa.com/species/engelmanns-milkweed/", "markdown": "https://milkweedusa.com/species/engelmanns-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_engelmanniana", "title": "Asclepias engelmanniana", "extract": "Asclepias engelmanniana, Engelmann's milkweed, is a species of milkweed from the central United States and northern Mexico." }, "gbif": { "id": 3170267, "url": "https://www.gbif.org/species/3170267", "accepted": "Asclepias engelmanniana Woodson" }, "inaturalist": { "id": 158738, "url": "https://www.inaturalist.org/taxa/158738", "observations": 1439 }, "powo": { "id": "290400-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:290400-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20engelmanniana.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20engelmanniana" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20engelmanniana" } }, "photoCount": 8 }, { "slug": "halls-milkweed", "scientificName": "Asclepias hallii", "authority": "A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Hall’s Milkweed", "Purple Silkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 18, 36 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 6, 7, 8 ], "peakBloomMonths": [ 7 ], "flowerColors": [ "pink", "mauve" ], "leafArrangement": "opposite", "leafShape": "lanceolate", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 4, 8 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 4, "nectar": 4 }, "statesRecorded": [ "AZ", "CO", "NM", "NV", "UT", "WY" ], "summary": "A handsome southern Rocky Mountain endemic with soft pink-mauve flower clusters and grayish lance-shaped leaves, growing on dry mesas, sandy foothills and piñon-juniper edges from Colorado to Nevada.", "identification": [ "Resembles a slimmer, drier-country showy milkweed with narrower leaves and smaller flowers.", "Flower clusters are terminal and upright, pale pink to dull rose.", "Stems often several from a spreading rootstock, sometimes forming loose colonies." ], "url": "https://milkweedusa.com/species/halls-milkweed/", "markdown": "https://milkweedusa.com/species/halls-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 3170237, "url": "https://www.gbif.org/species/3170237", "accepted": "Asclepias hallii A.Gray" }, "inaturalist": { "id": 158741, "url": "https://www.inaturalist.org/taxa/158741", "observations": 210 }, "powo": { "id": "94337-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94337-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20hallii.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20hallii" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20hallii" } }, "photoCount": 8 }, { "slug": "pallid-milkweed", "scientificName": "Asclepias cryptoceras", "authority": "S. Watson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Pallid Milkweed", "Jewelled Milkweed", "Humboldt Mountain Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 4, 12 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 4, 5, 6 ], "peakBloomMonths": [ 5 ], "flowerColors": [ "cream", "pink" ], "leafArrangement": "opposite", "leafShape": "orbicular", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 4, 8 ], "stratificationDays": 60, "ratings": { "garden": 2, "monarch": 2, "nectar": 3 }, "statesRecorded": [ "AZ", "CA", "CO", "ID", "NM", "NV", "OR", "UT", "WA", "WY" ], "summary": "A jewel of the Great Basin: a low sprawling rosette of round, waxy, blue-green leaves surrounding cream flowers with vivid rose-pink hoods, blooming in spring on barren clay and shale slopes where nothing else grows.", "identification": [ "Prostrate habit: the plant lies flat on the ground in a neat circle.", "Leaves nearly circular, thick, smooth and glaucous blue-green.", "Flowers cream with startlingly pink or purple hoods, unlike any other milkweed." ], "url": "https://milkweedusa.com/species/pallid-milkweed/", "markdown": "https://milkweedusa.com/species/pallid-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_cryptoceras", "title": "Asclepias cryptoceras", "extract": "Asclepias cryptoceras is a species of milkweed known by the common names jewel milkweed, pallid milkweed, Humboldt Mountains milkweed, and cow-cabbage. It is native to the Great Basin of western North America, where it grows in many types of habitat, especially dry areas. This is a perennial herb growing low against the ground or drooping. It arises from a fleshy, woody rhizome-like root. The thic" }, "gbif": { "id": 3170263, "url": "https://www.gbif.org/species/3170263", "accepted": "Asclepias cryptoceras S.Watson" }, "inaturalist": { "id": 62297, "url": "https://www.inaturalist.org/taxa/62297", "observations": 1027 }, "powo": { "id": "94206-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94206-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20cryptoceras.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20cryptoceras" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20cryptoceras" } }, "photoCount": 8 }, { "slug": "dwarf-milkweed", "scientificName": "Asclepias involucrata", "authority": "Engelm. ex Torr.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Dwarf Milkweed", "Involucrate Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 4, 10 ], "spreadInches": [ 10, 20 ], "bloomMonths": [ 4, 5, 6 ], "peakBloomMonths": [ 5 ], "flowerColors": [ "green", "cream" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 5, 9 ], "stratificationDays": 60, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AZ", "CO", "KS", "NM", "NV", "OK", "TX", "UT" ], "summary": "A tiny, ground-hugging desert milkweed with wavy narrow leaves and pale green flowers held almost at soil level, found on sand and gravel across the Southwest.", "identification": [ "Under a foot tall, with stems spreading flat from a central crown.", "Leaf margins conspicuously wavy or crisped.", "Flowers greenish-cream in clusters nestled among the leaves." ], "url": "https://milkweedusa.com/species/dwarf-milkweed/", "markdown": "https://milkweedusa.com/species/dwarf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_involucrata", "title": "Asclepias involucrata", "extract": "Asclepias involucrata, synonym Asclepias macrosperma, is a perennial plant in the family Apocynaceae native from the west and south central United States to north Mexico. In the southwestern United States, it is found in the Colorado Plateau and Canyonlands region." }, "gbif": { "id": 3170243, "url": "https://www.gbif.org/species/3170243", "accepted": "Asclepias involucrata Engelm. ex Torr." }, "inaturalist": { "id": 158743, "url": "https://www.inaturalist.org/taxa/158743", "observations": 203 }, "powo": { "id": "94357-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94357-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20involucrata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20involucrata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20involucrata" } }, "photoCount": 8 }, { "slug": "sand-milkweed", "scientificName": "Asclepias arenaria", "authority": "Torr.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Sand Milkweed", "Western Sand Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 12, 36 ], "bloomMonths": [ 6, 7, 8 ], "peakBloomMonths": [ 7 ], "flowerColors": [ "cream", "green" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 4, 8 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "AZ", "CO", "KS", "NE", "NM", "OK", "TX", "UT" ], "summary": "A stout, velvety-gray milkweed of deep sand, found in sandhills, blowouts and dune country from Nebraska to Texas, with crowded cream flower clusters and thick wavy-edged leaves.", "identification": [ "Whole plant densely covered in short white hairs, giving a gray cast.", "Leaves thick with distinctly wavy margins, held stiffly.", "Grows only in deep, loose sand, so habitat alone nearly identifies it." ], "url": "https://milkweedusa.com/species/sand-milkweed/", "markdown": "https://milkweedusa.com/species/sand-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_arenaria", "title": "Asclepias arenaria", "extract": "Asclepias arenaria, sand milkweed, is a species of milkweed that grows in the central US and northern Mexico." }, "gbif": { "id": 3170290, "url": "https://www.gbif.org/species/3170290", "accepted": "Asclepias arenaria Torr." }, "inaturalist": { "id": 158732, "url": "https://www.inaturalist.org/taxa/158732", "observations": 743 }, "powo": { "id": "94112-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94112-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20arenaria.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20arenaria" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20arenaria" } }, "photoCount": 8 }, { "slug": "slimleaf-milkweed", "scientificName": "Asclepias stenophylla", "authority": "A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Slimleaf Milkweed", "Narrow-leaf Green Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 18, 40 ], "spreadInches": [ 10, 18 ], "bloomMonths": [ 6, 7, 8 ], "peakBloomMonths": [ 7 ], "flowerColors": [ "cream", "green" ], "leafArrangement": "alternate", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 4, 8 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AR", "CO", "IA", "KS", "LA", "MO", "MT", "NE", "NM", "OK", "SD", "TX", "WY" ], "summary": "A tall wand of a plant with grass-fine leaves and creamy-green flowers clustered tight against the stem, scattered through unplowed tallgrass and mixed-grass prairie.", "identification": [ "Extremely narrow alternate leaves, sometimes eight inches long and only a few millimeters wide.", "Flowers greenish-cream in small axillary clusters up the stem.", "Reliable indicator of high-quality remnant prairie." ], "url": "https://milkweedusa.com/species/slimleaf-milkweed/", "markdown": "https://milkweedusa.com/species/slimleaf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_stenophylla", "title": "Asclepias stenophylla", "extract": "Asclepias stenophylla is a species of flowering plant in the dogbane family commonly called slimleaf milkweed and narrow-leaved green milkweed." }, "gbif": { "id": 3170321, "url": "https://www.gbif.org/species/3170321", "accepted": "Asclepias stenophylla A.Gray" }, "inaturalist": { "id": 158760, "url": "https://www.inaturalist.org/taxa/158760", "observations": 1151 }, "powo": { "id": "94664-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94664-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20stenophylla.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20stenophylla" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20stenophylla" } }, "photoCount": 8 }, { "slug": "longhood-milkweed", "scientificName": "Asclepias macrotis", "authority": "Torr.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Longhood Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 8, 20 ], "spreadInches": [ 10, 20 ], "bloomMonths": [ 4, 5, 6, 7, 8 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "green", "cream" ], "leafArrangement": "opposite", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 6, 9 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AZ", "CO", "NM", "TX" ], "summary": "A slender limestone-canyon milkweed of west Texas, New Mexico and southern Colorado, with thread-like leaves and small pale flowers whose unusually long hoods give it its name.", "identification": [ "Very long, projecting hoods on small greenish flowers.", "Wiry sprawling stems with thread-fine opposite leaves.", "Restricted to limestone outcrops and rocky canyon slopes." ], "url": "https://milkweedusa.com/species/longhood-milkweed/", "markdown": "https://milkweedusa.com/species/longhood-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_macrotis", "title": "Asclepias macrotis", "extract": "Asclepias macrotis, commonly longhorn milkweed or longhood milkweed, is a milkweed from the south central United States and northern Mexico." }, "gbif": { "id": 3170310, "url": "https://www.gbif.org/species/3170310", "accepted": "Asclepias macrotis Torr." }, "inaturalist": { "id": 121660, "url": "https://www.inaturalist.org/taxa/121660", "observations": 54 }, "powo": { "id": "94433-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94433-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20macrotis.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20macrotis" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20macrotis" } }, "photoCount": 8 }, { "slug": "wheel-milkweed", "scientificName": "Asclepias uncialis", "authority": "Greene", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Wheel Milkweed", "Dwarf Milkweed", "Greene’s Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 2, 6 ], "spreadInches": [ 4, 12 ], "bloomMonths": [ 4, 5, 6 ], "peakBloomMonths": [ 5 ], "flowerColors": [ "maroon", "green" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 4, 8 ], "stratificationDays": 60, "ratings": { "garden": 1, "monarch": 1, "nectar": 2 }, "statesRecorded": [ "AZ", "CO", "KS", "NM", "NV", "UT", "WY" ], "summary": "One of the rarest and smallest milkweeds in North America, a two-inch-high scatter of maroon-tinged flowers on the shortgrass steppe, tracked as a species of concern in several states including Colorado.", "identification": [ "Minute: frequently no taller than a golf tee, easily overlooked among grass.", "Flowers dull maroon and green, held just above the soil.", "Appears briefly in spring then disappears." ], "url": "https://milkweedusa.com/species/wheel-milkweed/", "markdown": "https://milkweedusa.com/species/wheel-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_uncialis", "title": "Asclepias uncialis", "extract": "Asclepias uncialis is a species of flowering plant in the dogbane family known by the common name wheel milkweed. It is native to the western United States. Two subspecies are sometimes described, with ssp. ruthiae containing three plants which are sometimes described as separate species, Asclepias ruthiae, A. eastwoodiana, and A. sanjuanensis." }, "gbif": { "id": 3170289, "url": "https://www.gbif.org/species/3170289", "accepted": "Asclepias uncialis Greene" }, "inaturalist": { "id": 126674, "url": "https://www.inaturalist.org/taxa/126674", "observations": 63 }, "powo": { "id": "94711-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94711-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20uncialis.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20uncialis" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20uncialis" } }, "photoCount": 6 }, { "slug": "prairie-milkweed", "scientificName": "Asclepias sullivantii", "authority": "Engelm. ex A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Prairie Milkweed", "Sullivant’s Milkweed", "Smooth Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 48 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 6, 7 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "pink", "rose" ], "leafArrangement": "opposite", "leafShape": "oblong", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "medium", "wet" ], "light": [ "full" ], "usdaZones": [ 3, 7 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 5, "nectar": 4 }, "statesRecorded": [ "IA", "IL", "IN", "KS", "KY", "MI", "MN", "MO", "ND", "NE", "OH", "OK", "SD", "WI" ], "summary": "Common milkweed’s refined cousin: the same big pink umbels and broad leaves, but smooth and hairless throughout, with an elegant red midrib and none of the coarseness. A tallgrass prairie plant that has declined sharply with the prairie itself.", "identification": [ "Completely smooth and hairless, with no down on stems, leaves or pods.", "Leaf midrib is often flushed pink or red.", "Leaves have a small abrupt point at the tip and are held stiffly upright.", "Pods are smooth with only a few short blunt projections, unlike the warty pods of common milkweed." ], "url": "https://milkweedusa.com/species/prairie-milkweed/", "markdown": "https://milkweedusa.com/species/prairie-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_sullivantii", "title": "Asclepias sullivantii", "extract": "Asclepias sullivantii is a species of flowering plant in the milkweed genus, Asclepias. Common names include prairie milkweed, Sullivant's milkweed, and smooth milkweed. It is native to North America, where it occurs in the central United States and Ontario in Canada." }, "gbif": { "id": 3170265, "url": "https://www.gbif.org/species/3170265", "accepted": "Asclepias sullivantii Engelm. ex A.Gray" }, "inaturalist": { "id": 158761, "url": "https://www.inaturalist.org/taxa/158761", "observations": 2303 }, "powo": { "id": "94678-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94678-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20sullivantii.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20sullivantii" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20sullivantii" } }, "photoCount": 8 }, { "slug": "poke-milkweed", "scientificName": "Asclepias exaltata", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Poke Milkweed", "Tall Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 36, 72 ], "spreadInches": [ 18, 30 ], "bloomMonths": [ 6, 7 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "white", "green" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "medium" ], "light": [ "part", "shade" ], "usdaZones": [ 3, 8 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "AL", "CT", "DC", "DE", "GA", "IA", "IL", "IN", "KY", "MA", "MD", "ME", "MI", "MN", "NC", "NH", "NJ", "NY", "OH", "PA", "RI", "SC", "TN", "VA", "VT", "WI", "WV" ], "summary": "The woodland milkweed. Tall and slender with broad thin leaves like pokeweed, carrying loose, drooping clusters of green-and-white flowers that hang like small chandeliers along a shaded forest edge.", "identification": [ "Grows in shade and dappled woodland, which no other milkweed reliably does.", "Flower clusters are loose and pendulous, with widely spaced flowers on long stalks.", "Petals green-tinged white, reflexed sharply back from pure white hoods.", "Leaves broad, thin, pointed at both ends, on distinct stalks." ], "url": "https://milkweedusa.com/species/poke-milkweed/", "markdown": "https://milkweedusa.com/species/poke-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_exaltata", "title": "Asclepias exaltata", "extract": "Asclepias exaltata is a species of flowering plant in the dogbane family, native to eastern North America." }, "gbif": { "id": 3170307, "url": "https://www.gbif.org/species/3170307", "accepted": "Asclepias exaltata L." }, "inaturalist": { "id": 125386, "url": "https://www.inaturalist.org/taxa/125386", "observations": 10783 }, "powo": { "id": "94266-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94266-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20exaltata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20exaltata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20exaltata" } }, "photoCount": 8 }, { "slug": "purple-milkweed", "scientificName": "Asclepias purpurascens", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Purple Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 48 ], "spreadInches": [ 18, 30 ], "bloomMonths": [ 5, 6, 7 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "purple", "magenta" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "medium", "dry" ], "light": [ "full", "part" ], "usdaZones": [ 3, 8 ], "stratificationDays": 30, "ratings": { "garden": 5, "monarch": 4, "nectar": 4 }, "statesRecorded": [ "AL", "AR", "CT", "DC", "DE", "GA", "IA", "IL", "IN", "KS", "KY", "LA", "MA", "MD", "ME", "MI", "MN", "MO", "MS", "NC", "NE", "NH", "NJ", "NY", "OH", "OK", "PA", "RI", "SC", "TN", "TX", "VA", "VT", "WI", "WV" ], "summary": "The most intensely colored milkweed in eastern North America, with deep magenta-purple flower heads held upright above broad leaves, blooming a few weeks before common milkweed. Uncommon and declining nearly everywhere, and worth every effort to establish.", "identification": [ "Flowers are a saturated purple-magenta, far darker than the dusty pink of common milkweed.", "Clusters are held erect at the top of the stem, not drooping.", "Blooms noticeably earlier than common milkweed.", "Leaves broad with a short abrupt tip, downy underneath." ], "url": "https://milkweedusa.com/species/purple-milkweed/", "markdown": "https://milkweedusa.com/species/purple-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_purpurascens", "title": "Asclepias purpurascens", "extract": "Asclepias purpurascens, or the purple milkweed, is a herbaceous plant species. It is in the genus Asclepias, making it a type of milkweed. It is native to the Eastern, Southern and Midwestern United States similar to the range of the common milkweed. The plant gets its name from the flowers that first develop a pink color but then turn darker purple as they mature. Unlike common milkweed, purple m" }, "gbif": { "id": 3170271, "url": "https://www.gbif.org/species/3170271", "accepted": "Asclepias purpurascens L." }, "inaturalist": { "id": 125380, "url": "https://www.inaturalist.org/taxa/125380", "observations": 5385 }, "powo": { "id": "94577-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94577-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20purpurascens.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20purpurascens" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20purpurascens" } }, "photoCount": 8 }, { "slug": "clasping-milkweed", "scientificName": "Asclepias amplexicaulis", "authority": "Sm.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Clasping Milkweed", "Blunt-leaved Milkweed", "Sand Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 18, 36 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 5, 6, 7 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "pink", "green", "mauve" ], "leafArrangement": "opposite", "leafShape": "clasping", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 3, 9 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "AL", "AR", "CT", "DC", "DE", "FL", "GA", "IA", "IL", "IN", "KS", "KY", "LA", "MA", "MD", "MI", "MN", "MO", "MS", "NC", "NE", "NH", "NJ", "NY", "OH", "OK", "PA", "RI", "SC", "TN", "TX", "VA", "WI", "WV" ], "summary": "Unmistakable once you have seen it: wavy-edged blue-green leaves clasping directly around the stem, and a single long bare stalk lifting one rounded cluster of dusty pink-green flowers well clear of the foliage.", "identification": [ "Leaf bases wrap around the stem with no stalk at all.", "Leaf margins are strongly wavy and the surface is smooth and waxy.", "One flower cluster per stem on a long naked peduncle.", "Almost always in dry sand or sandy loam." ], "url": "https://milkweedusa.com/species/clasping-milkweed/", "markdown": "https://milkweedusa.com/species/clasping-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_amplexicaulis", "title": "Asclepias amplexicaulis", "extract": "Asclepias amplexicaulis, the blunt-leaved milkweed, clasping milkweed, or sand milkweed, is a species of flowering plant in the subfamily Asclepiadoideae (Apocynaceae). It is endemic to the United States, where it is mostly found east of the Great Plains. It grows in dry prairies, savannas, open woods, and fallow fields, usually in sandy soil." }, "gbif": { "id": 3170332, "url": "https://www.gbif.org/species/3170332", "accepted": "Asclepias amplexicaulis Sm." }, "inaturalist": { "id": 47910, "url": "https://www.inaturalist.org/taxa/47910", "observations": 6402 }, "powo": { "id": "60445583-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:60445583-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20amplexicaulis.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20amplexicaulis" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20amplexicaulis" } }, "photoCount": 8 }, { "slug": "fourleaf-milkweed", "scientificName": "Asclepias quadrifolia", "authority": "Jacq.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Fourleaf Milkweed", "Whorled Woodland Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 24 ], "spreadInches": [ 9, 15 ], "bloomMonths": [ 5, 6 ], "peakBloomMonths": [ 5 ], "flowerColors": [ "pink", "white" ], "leafArrangement": "whorled", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "part", "shade" ], "usdaZones": [ 4, 8 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AL", "AR", "CT", "DC", "DE", "GA", "IA", "IL", "IN", "KY", "MA", "MD", "MI", "MO", "MS", "NC", "NH", "NJ", "NY", "OH", "PA", "RI", "SC", "TN", "VA", "VT", "WV" ], "summary": "A delicate spring milkweed of dry oak woodland: a slim stem carrying one whorl of four broad leaves at mid-height and a small airy cluster of pale pink flowers. The earliest milkweed to bloom across much of the East.", "identification": [ "A single whorl of four leaves partway up the stem, with opposite pairs above and below it.", "Small, pale pink to nearly white flowers in a loose cluster.", "Under two feet tall, growing in dry woodland shade.", "Flowers in May, weeks before other eastern milkweeds." ], "url": "https://milkweedusa.com/species/fourleaf-milkweed/", "markdown": "https://milkweedusa.com/species/fourleaf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_quadrifolia", "title": "Asclepias quadrifolia", "extract": "Asclepias quadrifolia, commonly called four-leaved milkweed or fourleaf milkweed, is a species of milkweed in the Apocynaceae (dogbane) family. It is sometimes referred to as whorled milkweed, but it should not be confused with Asclepias verticillata. A. quadrifolia occurs in the eastern United States and Canada." }, "gbif": { "id": 3170257, "url": "https://www.gbif.org/species/3170257", "accepted": "Asclepias quadrifolia Jacq." }, "inaturalist": { "id": 129548, "url": "https://www.inaturalist.org/taxa/129548", "observations": 6323 }, "powo": { "id": "94581-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94581-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20quadrifolia.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20quadrifolia" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20quadrifolia" } }, "photoCount": 8 }, { "slug": "white-milkweed", "scientificName": "Asclepias variegata", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "White Milkweed", "Redring Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 18, 42 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 5, 6, 7 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "white" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "part", "shade" ], "usdaZones": [ 5, 9 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 3, "nectar": 4 }, "statesRecorded": [ "AL", "AR", "CT", "DC", "DE", "FL", "GA", "IL", "IN", "KY", "LA", "MD", "MO", "MS", "NC", "NJ", "NY", "OH", "OK", "PA", "SC", "TN", "TX", "VA", "WV" ], "summary": "Tight snowball clusters of pure white flowers, each ringed with a fine purple-red band at its base, glowing in the half-shade of southeastern oak and pine woods. The most striking white-flowered milkweed in North America.", "identification": [ "Dense, almost spherical clusters of white flowers, unlike the loose heads of poke milkweed.", "A distinct dark red or purple ring where the hoods meet the corolla.", "Broad dark green leaves in well-spaced opposite pairs.", "Woodland and woodland-edge habitat." ], "url": "https://milkweedusa.com/species/white-milkweed/", "markdown": "https://milkweedusa.com/species/white-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_variegata", "title": "Asclepias variegata", "extract": "Asclepias variegata, commonly called the redring milkweed or white milkweed, is a plant in the family Apocynaceae. It is native to eastern North America, where it is found in Canada and the United States. It is most common in the Southeastern United States, and becomes rare in the northern edge of its range." }, "gbif": { "id": 3170272, "url": "https://www.gbif.org/species/3170272", "accepted": "Asclepias variegata L." }, "inaturalist": { "id": 127691, "url": "https://www.inaturalist.org/taxa/127691", "observations": 7803 }, "powo": { "id": "94717-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94717-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20variegata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20variegata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20variegata" } }, "photoCount": 8 }, { "slug": "green-antelopehorn", "scientificName": "Asclepias viridis", "authority": "Walter", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Green Antelopehorn", "Green Milkweed", "Spider Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 4, 5, 6, 7 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "green", "purple" ], "leafArrangement": "alternate", "leafShape": "oblong", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "full" ], "usdaZones": [ 5, 9 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 5, "nectar": 3 }, "statesRecorded": [ "AL", "AR", "CO", "FL", "GA", "IL", "IN", "KS", "KY", "LA", "MO", "MS", "NE", "NM", "OK", "SC", "TN", "TX" ], "summary": "The workhorse of the south-central states: sprawling stems, broad wavy leaves and big open clusters of pale green flowers with purple-tinged centers, blooming early across pasture, roadside and prairie from Texas to Tennessee.", "identification": [ "Flowers pale green with a purplish crown, in large loose clusters at the stem tips.", "Leaves broad, alternate and often with wavy edges.", "Stems lean and sprawl outward from the base.", "Very common on unimproved pasture and roadsides in Texas and Oklahoma." ], "url": "https://milkweedusa.com/species/green-antelopehorn/", "markdown": "https://milkweedusa.com/species/green-antelopehorn/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_viridis", "title": "Asclepias viridis", "extract": "Asclepias viridis is a species of milkweed, a plant in the dogbane family known by the common names green milkweed, green antelopehorn and spider milkweed. The Latin word viridis means green. The plant is native to the midwestern, south central and southeastern United States, as well as to the southeastern portion of the western United States." }, "gbif": { "id": 3170294, "url": "https://www.gbif.org/species/3170294", "accepted": "Asclepias viridis Walter" }, "inaturalist": { "id": 60946, "url": "https://www.inaturalist.org/taxa/60946", "observations": 32564 }, "powo": { "id": "94737-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94737-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20viridis.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20viridis" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20viridis" } }, "photoCount": 8 }, { "slug": "aquatic-milkweed", "scientificName": "Asclepias perennis", "authority": "Walter", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Aquatic Milkweed", "Swamp White Milkweed", "Thin-leaved Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 6, 7, 8 ], "flowerColors": [ "white", "pink" ], "leafArrangement": "opposite", "leafShape": "lanceolate", "sap": "milky", "rootSystem": "fibrous", "soilMoisture": [ "wet" ], "light": [ "part", "shade", "full" ], "usdaZones": [ 6, 9 ], "stratificationDays": 0, "ratings": { "garden": 4, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "AL", "AR", "FL", "GA", "IL", "IN", "KS", "KY", "LA", "MO", "MS", "NC", "OK", "SC", "TN", "TX", "VA" ], "summary": "A small, soft, white-flowered milkweed of southern swamps and river floodplains that will grow in standing water and in shade, two things no other milkweed manages. Its seeds are unique in the genus: they have no silky floss.", "identification": [ "Grows in genuinely wet ground, often with its feet in water.", "Small white flowers, sometimes pink-flushed, in delicate clusters.", "Thin, soft, pointed leaves; the whole plant is fine-textured.", "Seeds lack the parachute of silk found in every other milkweed." ], "url": "https://milkweedusa.com/species/aquatic-milkweed/", "markdown": "https://milkweedusa.com/species/aquatic-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_perennis", "title": "Asclepias perennis", "extract": "Asclepias perennis, also known as aquatic milkweed or white swamp milkweed, is a North American species of milkweed that is found throughout the Coastal Plain from eastern Texas to southern South Carolina, northward along the Mississippi River, and into the Ohio Valley of Illinois, Indiana, and Kentucky. There seems to be a few disjunct populations in Arkansas, Texas, and Indiana." }, "gbif": { "id": 3170346, "url": "https://www.gbif.org/species/3170346", "accepted": "Asclepias perennis Walter" }, "inaturalist": { "id": 120152, "url": "https://www.inaturalist.org/taxa/120152", "observations": 4983 }, "powo": { "id": "30270360-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30270360-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20perennis.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20perennis" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20perennis" } }, "photoCount": 8 }, { "slug": "pinewoods-milkweed", "scientificName": "Asclepias humistrata", "authority": "Walter", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Pinewoods Milkweed", "Sandhill Milkweed", "Purple Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 8, 24 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 3, 4, 5, 6 ], "peakBloomMonths": [ 4, 5 ], "flowerColors": [ "pink", "white" ], "leafArrangement": "opposite", "leafShape": "clasping", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full", "part" ], "usdaZones": [ 7, 10 ], "stratificationDays": 0, "ratings": { "garden": 3, "monarch": 5, "nectar": 3 }, "statesRecorded": [ "AL", "FL", "GA", "LA", "MS", "NC", "SC" ], "summary": "One of the most beautiful foliage plants in the genus: sprawling stems of thick blue-gray clasping leaves veined in bright pink, lying flat on white sand under longleaf pine, topped with pale pink-white flowers in spring.", "identification": [ "Leaves waxy blue-gray with vivid pink or magenta veins, and unmistakable for it.", "Stems lie flat along the ground, radiating from a central taproot.", "Grows only in deep dry sand, typically in longleaf pine sandhill.", "Blooms very early, from March." ], "url": "https://milkweedusa.com/species/pinewoods-milkweed/", "markdown": "https://milkweedusa.com/species/pinewoods-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_humistrata", "title": "Asclepias humistrata", "extract": "Asclepias humistrata, or the sandhill milkweed, is a species of milkweed plant. It is also known as pinewoods milkweed and pink-veined milkplant. It belongs in the subfamily Asclepiadoideae. It is native to the southeastern United States. It is found in well-drained areas such as sandy woodlands, sandy hills, and Florida scrub." }, "gbif": { "id": 3170319, "url": "https://www.gbif.org/species/3170319", "accepted": "Asclepias humistrata Walter" }, "inaturalist": { "id": 128756, "url": "https://www.inaturalist.org/taxa/128756", "observations": 5023 }, "powo": { "id": "94346-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94346-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20humistrata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20humistrata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20humistrata" } }, "photoCount": 8 }, { "slug": "velvetleaf-milkweed", "scientificName": "Asclepias tomentosa", "authority": "Elliott", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Velvetleaf Milkweed", "Tuba Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 12, 30 ], "bloomMonths": [ 4, 5, 6, 7 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "green", "cream" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 2 }, "statesRecorded": [ "AL", "FL", "GA", "SC" ], "summary": "A softly furred, low-growing milkweed of southeastern coastal sandhills and scrub, with greenish-cream flowers and leaves felted enough to feel like suede.", "identification": [ "Whole plant densely velvety to the touch.", "Sprawling to weakly upright stems in deep coastal sand.", "Small greenish-white flowers with cream hoods." ], "url": "https://milkweedusa.com/species/velvetleaf-milkweed/", "markdown": "https://milkweedusa.com/species/velvetleaf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_tomentosa", "title": "Asclepias tomentosa", "extract": "Asclepias tomentosa is a flowering plant in the milkweed family. It is indigenous to parts of Florida, Texas, and some southeastern states in the United States. It is a perennial dicot." }, "gbif": { "id": 3170331, "url": "https://www.gbif.org/species/3170331", "accepted": "Asclepias tomentosa Elliott" }, "inaturalist": { "id": 145567, "url": "https://www.inaturalist.org/taxa/145567", "observations": 1255 }, "powo": { "id": "94697-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94697-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20tomentosa.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20tomentosa" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20tomentosa" } }, "photoCount": 8 }, { "slug": "michauxs-milkweed", "scientificName": "Asclepias michauxii", "authority": "Decne.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Michaux’s Milkweed", "Southern Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 8, 20 ], "spreadInches": [ 8, 16 ], "bloomMonths": [ 4, 5, 6, 7 ], "peakBloomMonths": [ 5 ], "flowerColors": [ "pink", "green" ], "leafArrangement": "opposite", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AL", "FL", "GA", "NC", "SC" ], "summary": "A slender pine-flatwoods milkweed of the coastal plain with very narrow leaves and small dusky pink-green flowers, dependent on regular fire to keep its habitat open.", "identification": [ "Narrow, almost grass-like opposite leaves on a short upright stem.", "Small flowers in a loose terminal cluster, dull pink over green.", "Found in frequently burned pine flatwoods and savanna." ], "url": "https://milkweedusa.com/species/michauxs-milkweed/", "markdown": "https://milkweedusa.com/species/michauxs-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_michauxii", "title": "Asclepias michauxii", "extract": "Asclepias michauxii, or Michaux's milkweed, is a species of flowering plant in the family Apocynaceae. It is endemic to the southeastern United States, where it occurs from southeastern North Carolina south to peninsular Florida and west to eastern Louisiana." }, "gbif": { "id": 3170238, "url": "https://www.gbif.org/species/3170238", "accepted": "Asclepias michauxii Decne." }, "inaturalist": { "id": 158750, "url": "https://www.inaturalist.org/taxa/158750", "observations": 659 }, "powo": { "id": "94453-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94453-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20michauxii.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20michauxii" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20michauxii" } }, "photoCount": 8 }, { "slug": "pineland-milkweed", "scientificName": "Asclepias obovata", "authority": "Elliott", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Pineland Milkweed", "Obovate Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 6, 7, 8 ], "peakBloomMonths": [ 7 ], "flowerColors": [ "green", "yellow" ], "leafArrangement": "opposite", "leafShape": "oblong", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 7, 9 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 2 }, "statesRecorded": [ "AL", "FL", "GA", "LA", "MS", "SC", "TX" ], "summary": "A modest greenish-yellow-flowered milkweed of dry southeastern pinelands and sandy roadsides, with softly hairy paddle-shaped leaves.", "identification": [ "Leaves broadest above the middle, blunt-tipped and downy.", "Greenish-yellow flowers in small axillary clusters.", "Dry sandy pine woods and their margins." ], "url": "https://milkweedusa.com/species/pineland-milkweed/", "markdown": "https://milkweedusa.com/species/pineland-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_obovata", "title": "Asclepias obovata", "extract": "Asclepias obovata, commonly known as pineland milkweed, is a species of flowering plant in the family Apocynaceae. It is endemic to the southeastern United States, where it occurs in sandy, fire-maintained habitats such as longleaf pine savannas." }, "gbif": { "id": 3170299, "url": "https://www.gbif.org/species/3170299", "accepted": "Asclepias obovata Elliott" }, "inaturalist": { "id": 158752, "url": "https://www.inaturalist.org/taxa/158752", "observations": 878 }, "powo": { "id": "329559-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:329559-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20obovata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20obovata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20obovata" } }, "photoCount": 8 }, { "slug": "largeflower-milkweed", "scientificName": "Asclepias connivens", "authority": "Baldwin", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Largeflower Milkweed", "Largeflower Green Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 10, 20 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "green", "white" ], "leafArrangement": "opposite", "leafShape": "oblong", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "wet", "medium" ], "light": [ "full" ], "usdaZones": [ 8, 10 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AL", "FL", "GA", "NC", "SC" ], "summary": "A wet pine savanna milkweed with unusually large, pale green, cup-shaped flowers whose hoods lean inward and meet over the center, a structure found nowhere else in the genus.", "identification": [ "Flowers noticeably large for a green milkweed, with hoods converging over the top.", "Few flowers per cluster, giving an open, sculptural look.", "Restricted to wet pine flatwoods and savanna on the coastal plain." ], "url": "https://milkweedusa.com/species/largeflower-milkweed/", "markdown": "https://milkweedusa.com/species/largeflower-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_connivens", "title": "Asclepias connivens", "extract": "Asclepias connivens is a species of milkweed, commonly called Baldwin's milkweed or the largeflower milkweed. It is an obligate wetland species, native to the southeastern United States." }, "gbif": { "id": 7947055, "url": "https://www.gbif.org/species/7947055", "accepted": "Asclepias connivens Baldwin ex Elliott" }, "inaturalist": { "id": 158735, "url": "https://www.inaturalist.org/taxa/158735", "observations": 484 }, "powo": { "id": "94179-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94179-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20connivens.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20connivens" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20connivens" } }, "photoCount": 8 }, { "slug": "fewflower-milkweed", "scientificName": "Asclepias lanceolata", "authority": "Walter", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Fewflower Milkweed", "Cedar Hill Milkweed", "Purple Silkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 60 ], "spreadInches": [ 10, 18 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "orange", "red" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "fibrous", "soilMoisture": [ "wet" ], "light": [ "full" ], "usdaZones": [ 6, 10 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 3, "nectar": 4 }, "statesRecorded": [ "AL", "DE", "FL", "GA", "LA", "MD", "MS", "NC", "NJ", "SC", "TX", "VA" ], "summary": "A tall, sparse, brilliant orange-red milkweed of coastal marsh and wet savanna. Imagine butterfly weed stretched to five feet, standing in a brackish ditch with only a handful of flowers per head.", "identification": [ "Tall unbranched stem with very few, very narrow leaf pairs.", "Flowers vivid orange-red, in small clusters of a dozen or fewer.", "Coastal wetlands, brackish marsh edges and wet pine savanna." ], "url": "https://milkweedusa.com/species/fewflower-milkweed/", "markdown": "https://milkweedusa.com/species/fewflower-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_lanceolata", "title": "Asclepias lanceolata", "extract": "Asclepias lanceolata, the fewflower milkweed, is a species of milkweed that is native to the coastal plain of the United States from New Jersey to Florida and Southeast Texas. A. lanceolata is an upright, perennial plant that can grow between 3 and 5 feet tall, with red-orange flowers blooming in the summer months. It can also be referred to as Cedar Hill milkweed, as it was first described by Dr." }, "gbif": { "id": 3170251, "url": "https://www.gbif.org/species/3170251", "accepted": "Asclepias lanceolata Walter" }, "inaturalist": { "id": 158744, "url": "https://www.inaturalist.org/taxa/158744", "observations": 3825 }, "powo": { "id": "30049929-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30049929-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20lanceolata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20lanceolata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20lanceolata" } }, "photoCount": 8 }, { "slug": "red-milkweed", "scientificName": "Asclepias rubra", "authority": "L.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Red Milkweed", "Bog Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 48 ], "spreadInches": [ 12, 20 ], "bloomMonths": [ 6, 7 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "red", "pink" ], "leafArrangement": "opposite", "leafShape": "lanceolate", "sap": "milky", "rootSystem": "fibrous", "soilMoisture": [ "wet" ], "light": [ "full", "part" ], "usdaZones": [ 6, 9 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AL", "CT", "DE", "FL", "GA", "KY", "LA", "MD", "MS", "NC", "NJ", "NY", "OK", "PA", "SC", "TN", "TX", "VA" ], "summary": "A rare bog and seepage-slope milkweed with dusky rose-red flowers and stiff, sharply pointed leaves, scattered thinly down the Atlantic coastal plain and listed as endangered in most northern states where it survives.", "identification": [ "Flowers dull red to rose, in one or a few upright clusters.", "Leaves lance-shaped with a long tapering point and rounded base, held stiffly.", "Acid bogs, seepage slopes and pitcher plant savannas." ], "url": "https://milkweedusa.com/species/red-milkweed/", "markdown": "https://milkweedusa.com/species/red-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_rubra", "title": "Asclepias rubra", "extract": "Asclepias rubra, the red milkweed, purple savanna milkweed, or tall pink bog milkweed, is a species of milkweed. It inhabits bogs and wetlands. It is a perennial wetland species, native to New York, south to Florida, west to Arkansas and Texas." }, "gbif": { "id": 3170334, "url": "https://www.gbif.org/species/3170334", "accepted": "Asclepias rubra L." }, "inaturalist": { "id": 143553, "url": "https://www.inaturalist.org/taxa/143553", "observations": 686 }, "powo": { "id": "94615-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94615-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20rubra.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20rubra" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20rubra" } }, "photoCount": 8 }, { "slug": "carolina-milkweed", "scientificName": "Asclepias cinerea", "authority": "Walter", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Carolina Milkweed", "Ash-colored Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 8, 16 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "mauve", "gray" ], "leafArrangement": "opposite", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 8, 9 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AL", "FL", "GA", "MS", "NC", "SC" ], "summary": "A wiry, thread-leaved coastal plain milkweed carrying a few widely spaced, unusually elegant ash-mauve flowers that seem to hover in mid-air on hair-fine stalks.", "identification": [ "Very fine, almost invisible flower stalks, so the blooms appear to float.", "Flowers pale gray-lavender, sparse, in small open clusters.", "Thread-like opposite leaves on a slender stem in dry sandy pineland." ], "url": "https://milkweedusa.com/species/carolina-milkweed/", "markdown": "https://milkweedusa.com/species/carolina-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_cinerea", "title": "Asclepias cinerea", "extract": "Asclepias cinerea, also known as Carolina milkweed or ashy milkweed, is a herbaceous perennial plant species in the genus Asclepias. It is native to the United States where its range is concentrated in the Southeast." }, "gbif": { "id": 3170337, "url": "https://www.gbif.org/species/3170337", "accepted": "Asclepias cinerea Walter" }, "inaturalist": { "id": 158734, "url": "https://www.inaturalist.org/taxa/158734", "observations": 736 }, "powo": { "id": "94162-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94162-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20cinerea.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20cinerea" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20cinerea" } }, "photoCount": 8 }, { "slug": "longleaf-milkweed", "scientificName": "Asclepias longifolia", "authority": "Michx.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Longleaf Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 8, 16 ], "bloomMonths": [ 4, 5, 6, 7 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "green", "purple", "white" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "fibrous", "soilMoisture": [ "wet", "medium" ], "light": [ "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AL", "AR", "DE", "FL", "GA", "LA", "MD", "MS", "NC", "NJ", "SC", "TX", "VA" ], "summary": "A slim coastal plain milkweed of damp pine savanna, with long narrow leaves and greenish-white flowers heavily washed in purple, borne in nodding clusters from the upper leaf axils.", "identification": [ "Long, narrow, closely spaced opposite leaves.", "Flowers green-white strongly tinted purple, in drooping axillary clusters.", "Moist pine savanna and flatwoods." ], "url": "https://milkweedusa.com/species/longleaf-milkweed/", "markdown": "https://milkweedusa.com/species/longleaf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_longifolia", "title": "Asclepias longifolia", "extract": "Asclepias longifolia, or the longleaf milkweed, is a flowering plant native to the southern United States from Texas to Delaware. It is rare in the north end of its range and is presumed to be extinct in Delaware." }, "gbif": { "id": 3170230, "url": "https://www.gbif.org/species/3170230", "accepted": "Asclepias longifolia Michx." }, "inaturalist": { "id": 158748, "url": "https://www.inaturalist.org/taxa/158748", "observations": 1254 }, "powo": { "id": "329558-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:329558-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20longifolia.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20longifolia" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20longifolia" } }, "photoCount": 8 }, { "slug": "tall-green-milkweed", "scientificName": "Asclepias hirtella", "authority": "(Pennell) Woodson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Tall Green Milkweed", "Prairie Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 48 ], "spreadInches": [ 10, 18 ], "bloomMonths": [ 6, 7, 8 ], "peakBloomMonths": [ 7 ], "flowerColors": [ "green", "white" ], "leafArrangement": "alternate", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "full" ], "usdaZones": [ 4, 8 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AL", "AR", "IA", "IL", "IN", "KS", "KY", "LA", "MI", "MN", "MO", "MS", "NE", "OH", "OK", "TN", "TX", "WI" ], "summary": "A stiff, upright tallgrass-prairie milkweed with crowded narrow leaves and dense round clusters of small greenish-white flowers, common on prairie remnants and railroad rights of way through the Midwest.", "identification": [ "Numerous narrow alternate leaves crowded up a single rigid stem.", "Tight, ball-like clusters of small green-white flowers in the leaf axils.", "Indicator of remnant prairie and old cemetery prairies." ], "url": "https://milkweedusa.com/species/tall-green-milkweed/", "markdown": "https://milkweedusa.com/species/tall-green-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_hirtella", "title": "Asclepias hirtella", "extract": "Asclepias hirtella, commonly called the tall green milkweed, is a species of flowering plant in the milkweed genus and dogbane family (Apocynaceae). It is native to Canada and the United States, where its range is concentrated in the Midwest and Upper South." }, "gbif": { "id": 3170338, "url": "https://www.gbif.org/species/3170338", "accepted": "Asclepias hirtella (Pennell) Woodson" }, "inaturalist": { "id": 127690, "url": "https://www.inaturalist.org/taxa/127690", "observations": 2993 }, "powo": { "id": "21200-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21200-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20hirtella.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20hirtella" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20hirtella" } }, "photoCount": 8 }, { "slug": "meads-milkweed", "scientificName": "Asclepias meadii", "authority": "Torr. ex A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Mead’s Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 12, 24 ], "spreadInches": [ 8, 14 ], "bloomMonths": [ 5, 6 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "green", "cream" ], "leafArrangement": "opposite", "leafShape": "oblong", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "medium", "dry" ], "light": [ "full" ], "usdaZones": [ 4, 7 ], "stratificationDays": 60, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "IA", "IL", "KS", "MO" ], "summary": "A federally threatened tallgrass-prairie milkweed with a single nodding cluster of greenish-cream flowers on a slim glaucous stem. It survives almost entirely on hay meadows and prairie remnants that have never been plowed.", "identification": [ "One drooping flower cluster per stem, pale green-cream.", "Smooth blue-green leaves in widely spaced opposite pairs.", "Found only on high-quality unplowed tallgrass prairie." ], "url": "https://milkweedusa.com/species/meads-milkweed/", "markdown": "https://milkweedusa.com/species/meads-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_meadii", "title": "Asclepias meadii", "extract": "Asclepias meadii is a rare species of milkweed known by the common name Mead's milkweed. It is native to the American Midwest, where it was probably once quite widespread in the tallgrass prairie. Today much of the Midwest has been fragmented and claimed for agriculture, and the remaining prairie habitat is degraded." }, "gbif": { "id": 3170259, "url": "https://www.gbif.org/species/3170259", "accepted": "Asclepias meadii Torr. ex A.Gray" }, "inaturalist": { "id": 158749, "url": "https://www.inaturalist.org/taxa/158749", "observations": 195 }, "powo": { "id": "94445-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94445-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20meadii.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20meadii" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20meadii" } }, "photoCount": 8 }, { "slug": "ovalleaf-milkweed", "scientificName": "Asclepias ovalifolia", "authority": "Decne.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Oval-leaf Milkweed", "Dwarf Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 8, 20 ], "spreadInches": [ 12, 30 ], "bloomMonths": [ 6, 7 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "white", "green" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry", "medium" ], "light": [ "full", "part" ], "usdaZones": [ 3, 7 ], "stratificationDays": 60, "ratings": { "garden": 3, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "IA", "IL", "MI", "MN", "MT", "ND", "NE", "SD", "WI" ], "summary": "A compact northern-prairie milkweed under two feet tall, with neat oval leaves and small creamy-white flower clusters, found on sandy prairie and open oak savanna from Michigan to Montana.", "identification": [ "Short stature with evenly spaced oval opposite leaves, downy beneath.", "One or two small terminal clusters of creamy white to greenish flowers.", "Northern prairie, sand savanna and open jack pine barrens." ], "url": "https://milkweedusa.com/species/ovalleaf-milkweed/", "markdown": "https://milkweedusa.com/species/ovalleaf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_ovalifolia", "title": "Asclepias ovalifolia", "extract": "Asclepias ovalifolia, commonly called oval-leaved milkweed or dwarf milkweed, is a species of flowering plant in the milkweed genus and dogbane family (Apocynaceae). It is native to South Central Canada and the Northern Midwest of the United States." }, "gbif": { "id": 3170264, "url": "https://www.gbif.org/species/3170264", "accepted": "Asclepias ovalifolia Decne." }, "inaturalist": { "id": 47905, "url": "https://www.inaturalist.org/taxa/47905", "observations": 1958 }, "powo": { "id": "94507-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94507-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20ovalifolia.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20ovalifolia" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20ovalifolia" } }, "photoCount": 8 }, { "slug": "woolly-milkweed", "scientificName": "Asclepias lanuginosa", "authority": "Nutt.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Woolly Milkweed", "Side-cluster Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 4, 12 ], "spreadInches": [ 6, 12 ], "bloomMonths": [ 5, 6 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "cream", "green" ], "leafArrangement": "alternate", "leafShape": "lanceolate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 3, 7 ], "stratificationDays": 60, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "IA", "IL", "KS", "MI", "MN", "MO", "ND", "NE", "SD", "WI" ], "summary": "A tiny, shaggy-haired prairie milkweed only a few inches tall, with one cream flower cluster held on a short stalk. Conservation-listed across most of the upper Midwest.", "identification": [ "Densely covered in long soft hairs throughout.", "Very short stature with a single cream-green flower cluster.", "Dry gravel prairie and hill prairie remnants." ], "url": "https://milkweedusa.com/species/woolly-milkweed/", "markdown": "https://milkweedusa.com/species/woolly-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_lanuginosa", "title": "Asclepias lanuginosa", "extract": "Asclepias lanuginosa, the woolly milkweed or sidecluster milkweed, is a species of flowering plant in the dogbane family, Apocynaceae, native to central Canada and the upper Midwest United States. It was described in 1818. It is a perennial herb that grows 6–12 inches (15–30 cm) tall." }, "gbif": { "id": 3170327, "url": "https://www.gbif.org/species/3170327", "accepted": "Asclepias lanuginosa Nutt." }, "inaturalist": { "id": 158745, "url": "https://www.inaturalist.org/taxa/158745", "observations": 302 }, "powo": { "id": "329557-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:329557-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20lanuginosa.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20lanuginosa" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20lanuginosa" } }, "photoCount": 8 }, { "slug": "california-milkweed", "scientificName": "Asclepias californica", "authority": "Greene", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "California Milkweed", "Round-hooded Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 4, 5, 6, 7 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "maroon", "purple" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 8, 10 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "CA" ], "summary": "A gorgeous, entirely white-woolly California endemic whose deep wine-red flowers hang in heavy nodding clusters against silver foliage. It looks like a plant designed rather than evolved.", "identification": [ "Entire plant thickly felted in white wool, giving a silver-gray appearance.", "Flowers deep maroon to dusty purple-red, in large drooping clusters.", "Stems sprawl and arch outward from a woody crown.", "Chaparral, oak woodland and grassland slopes below 7,000 feet." ], "url": "https://milkweedusa.com/species/california-milkweed/", "markdown": "https://milkweedusa.com/species/california-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_californica", "title": "Asclepias californica", "extract": "Asclepias californica is a species of milkweed known by the common name California milkweed. It grows throughout lower northern, central and southern California." }, "gbif": { "id": 3170236, "url": "https://www.gbif.org/species/3170236", "accepted": "Asclepias californica Greene" }, "inaturalist": { "id": 51272, "url": "https://www.inaturalist.org/taxa/51272", "observations": 2450 }, "powo": { "id": "21153-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21153-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20californica.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20californica" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20californica" } }, "photoCount": 8 }, { "slug": "woollypod-milkweed", "scientificName": "Asclepias eriocarpa", "authority": "Benth.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Woollypod Milkweed", "Indian Milkweed", "Kotolo" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 48 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "cream", "white" ], "leafArrangement": "whorled", "leafShape": "oblong", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "CA", "NV" ], "summary": "A stout, woolly, cream-flowered California milkweed of dry hillsides and roadsides, with thick whorled leaves and densely hairy pods. Historically the most important fiber plant of several California Indigenous nations.", "identification": [ "Thick, wavy-edged leaves usually in whorls of three or four.", "Dense clusters of cream-white flowers with a waxy look.", "Pods conspicuously covered in white wool." ], "url": "https://milkweedusa.com/species/woollypod-milkweed/", "markdown": "https://milkweedusa.com/species/woollypod-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_eriocarpa", "title": "Asclepias eriocarpa", "extract": "Asclepias eriocarpa is a species of milkweed known by the common names woollypod milkweed, Indian milkweed, and kotolo. It is a perennial herb that grows in many types of habitats." }, "gbif": { "id": 3170253, "url": "https://www.gbif.org/species/3170253", "accepted": "Asclepias eriocarpa Benth." }, "inaturalist": { "id": 58796, "url": "https://www.inaturalist.org/taxa/58796", "observations": 7570 }, "powo": { "id": "94258-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94258-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20eriocarpa.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20eriocarpa" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20eriocarpa" } }, "photoCount": 8 }, { "slug": "heartleaf-milkweed", "scientificName": "Asclepias cordifolia", "authority": "(Benth.) Jeps.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Heartleaf Milkweed", "Purple Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 18, 30 ], "bloomMonths": [ 5, 6, 7 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "maroon", "purple" ], "leafArrangement": "opposite", "leafShape": "cordate", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry" ], "light": [ "full", "part" ], "usdaZones": [ 6, 9 ], "stratificationDays": 30, "ratings": { "garden": 5, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "CA", "NV", "OR" ], "summary": "Arguably the handsomest milkweed in the West: smooth, waxy, blue-gray heart-shaped leaves clasping arching purple stems, hung with clusters of dark wine-red flowers. A Sierra Nevada and Cascade foothill specialty.", "identification": [ "Leaves distinctly heart-shaped, clasping the stem, smooth and blue-glaucous.", "Stems often flushed purple and arching.", "Flowers deep red-purple with paler hoods, in loose nodding clusters.", "Rocky slopes and open conifer forest, 1,000 to 6,500 feet." ], "url": "https://milkweedusa.com/species/heartleaf-milkweed/", "markdown": "https://milkweedusa.com/species/heartleaf-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_cordifolia", "title": "Asclepias cordifolia", "extract": "Asclepias cordifolia is a species of milkweed commonly called heart-leaf milkweed or purple milkweed. It is native to the western United States, growing between 50 and 2,000 m elevation in the northern Sierra Nevada and Cascade ranges. Heart-leaf milkweed was valued by the Native American Miwok tribe for its stems, which they dried and processed into string and rope." }, "gbif": { "id": 3170280, "url": "https://www.gbif.org/species/3170280", "accepted": "Asclepias cordifolia (Benth.) Jeps." }, "inaturalist": { "id": 62248, "url": "https://www.inaturalist.org/taxa/62248", "observations": 5175 }, "powo": { "id": "21169-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21169-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20cordifolia.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20cordifolia" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20cordifolia" } }, "photoCount": 8 }, { "slug": "woolly-milkweed-vestita", "scientificName": "Asclepias vestita", "authority": "Hook. & Arn.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Woolly Milkweed", "Vestita Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 18, 30 ], "bloomMonths": [ 4, 5, 6, 7 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "cream", "yellow" ], "leafArrangement": "alternate", "leafShape": "oblong", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 8, 10 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 2 }, "statesRecorded": [ "CA", "NV" ], "summary": "A low, densely white-woolly milkweed of California’s San Joaquin Valley and adjacent desert edges, with crowded pale yellow-cream flowers and thick felted leaves.", "identification": [ "Heavily white-woolly throughout, often looking almost gray-white.", "Leaves broad, thick and crowded along sprawling stems.", "Pale cream to yellowish flowers in tight clusters." ], "url": "https://milkweedusa.com/species/woolly-milkweed-vestita/", "markdown": "https://milkweedusa.com/species/woolly-milkweed-vestita/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_vestita", "title": "Asclepias vestita", "extract": "Asclepias vestita is a species of milkweed known by the common name woolly milkweed. It is endemic to California, where it grows in many habitats across the state, from mountains to desert to valley. This is a robust perennial herb growing mostly upright or slightly bending. The thick leaves are oval to narrowly lance-shaped. The stem and leaves often have a coat of light-colored hairs, sometimes " }, "gbif": { "id": 3170336, "url": "https://www.gbif.org/species/3170336", "accepted": "Asclepias vestita Hook. & Arn." }, "inaturalist": { "id": 58529, "url": "https://www.inaturalist.org/taxa/58529", "observations": 326 }, "powo": { "id": "94723-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94723-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20vestita.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20vestita" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20vestita" } }, "photoCount": 8 }, { "slug": "desert-milkweed", "scientificName": "Asclepias erosa", "authority": "Torr.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Desert Milkweed", "Erose Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 60 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 4, 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "cream", "yellow" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 8, 11 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "AZ", "CA", "NV", "UT" ], "summary": "A big, pale, upright milkweed of the Mojave and Sonoran deserts, with chalky white stems, thick cream-edged leaves and heavy clusters of yellowish-white flowers that persist through the hottest months.", "identification": [ "Tall stiff stems that look bleached white or very pale green.", "Thick leaves with pale, often crisped or eroded-looking margins.", "Large clusters of cream-yellow flowers, blooming in true desert heat." ], "url": "https://milkweedusa.com/species/desert-milkweed/", "markdown": "https://milkweedusa.com/species/desert-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_erosa", "title": "Asclepias erosa", "extract": "Asclepias erosa is a species of milkweed known commonly as desert milkweed. It is native to southern California, Arizona, and northern Baja California, where it is most abundant in the desert regions." }, "gbif": { "id": 3170333, "url": "https://www.gbif.org/species/3170333", "accepted": "Asclepias erosa Torr." }, "inaturalist": { "id": 57907, "url": "https://www.inaturalist.org/taxa/57907", "observations": 2442 }, "powo": { "id": "94260-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94260-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20erosa.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20erosa" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20erosa" } }, "photoCount": 8 }, { "slug": "rush-milkweed", "scientificName": "Asclepias subulata", "authority": "Decne.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Rush Milkweed", "Desert Milkweed", "Ajamete" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 24, 72 ], "spreadInches": [ 24, 48 ], "bloomMonths": [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ], "peakBloomMonths": [ 4, 5, 9, 10 ], "flowerColors": [ "cream", "white" ], "leafArrangement": "opposite", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 8, 11 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 4, "nectar": 3 }, "statesRecorded": [ "AZ", "CA", "NV", "UT" ], "summary": "A leafless-looking fountain of blue-green pencil-thick stems topped with cream flowers, growing in the hottest, driest washes of the Sonoran and Mojave deserts. It looks like a sculpture and needs no water at all.", "identification": [ "Effectively leafless, because the narrow leaves drop early and leave bundles of erect stems.", "Stems pale blue-green, rush-like, growing in a dense vase-shaped clump.", "Cream to white flowers in small clusters near the stem tips, almost year-round." ], "url": "https://milkweedusa.com/species/rush-milkweed/", "markdown": "https://milkweedusa.com/species/rush-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_subulata", "title": "Asclepias subulata", "extract": "Asclepias subulata is a species of milkweed known commonly as the rush milkweed, desert milkweed or ajamete. This is an erect perennial herb which loses its leaves early in the season and stands as a cluster of naked stalks. Atop the stems are inflorescences of distinctive flowers. Each cream-white flower has a reflexed corolla that reveals the inner parts, a network of five shiny columns, each to" }, "gbif": { "id": 3170301, "url": "https://www.gbif.org/species/3170301", "accepted": "Asclepias subulata Decne." }, "inaturalist": { "id": 62291, "url": "https://www.inaturalist.org/taxa/62291", "observations": 6044 }, "powo": { "id": "94672-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94672-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20subulata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20subulata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20subulata" } }, "photoCount": 8 }, { "slug": "pineneedle-milkweed", "scientificName": "Asclepias linaria", "authority": "Cav.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Pineneedle Milkweed", "Needle-leaf Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 18, 48 ], "spreadInches": [ 18, 36 ], "bloomMonths": [ 3, 4, 5, 6, 7, 8, 9, 10 ], "peakBloomMonths": [ 4, 5, 9 ], "flowerColors": [ "white", "cream" ], "leafArrangement": "alternate", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 8, 11 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AZ", "NM", "TX" ], "summary": "A shrubby, evergreen-looking milkweed densely clothed in soft needle-like leaves, resembling a small conifer until it produces its white flower clusters. A favorite of desert gardeners in Arizona and New Mexico.", "identification": [ "Dense, soft, pine-needle foliage on a woody-based shrubby plant.", "Small white flowers in tight rounded clusters at the branch tips.", "Retains foliage year-round in frost-free areas." ], "url": "https://milkweedusa.com/species/pineneedle-milkweed/", "markdown": "https://milkweedusa.com/species/pineneedle-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_linaria", "title": "Asclepias linaria", "extract": "Asclepias linaria is a species of milkweed known by the common name pineneedle milkweed." }, "gbif": { "id": 3170270, "url": "https://www.gbif.org/species/3170270", "accepted": "Asclepias linaria Cav." }, "inaturalist": { "id": 62295, "url": "https://www.inaturalist.org/taxa/62295", "observations": 3797 }, "powo": { "id": "94400-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94400-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20linaria.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20linaria" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20linaria" } }, "photoCount": 8 }, { "slug": "zizotes-milkweed", "scientificName": "Asclepias oenotheroides", "authority": "Schltdl. & Cham.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Zizotes Milkweed", "Side-cluster Milkweed", "Hierba de Zizotes" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 8, 24 ], "spreadInches": [ 12, 30 ], "bloomMonths": [ 3, 4, 5, 6, 7, 8, 9, 10 ], "peakBloomMonths": [ 4, 5, 9 ], "flowerColors": [ "green", "cream" ], "leafArrangement": "opposite", "leafShape": "oblong", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry", "medium" ], "light": [ "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 5, "nectar": 3 }, "statesRecorded": [ "AZ", "KS", "NM", "OK", "TX" ], "summary": "A low, sprawling Texas and Southwest milkweed with wavy-edged leaves and greenish-cream flower clusters arising from the leaf axils. It blooms for most of the year and re-sprouts endlessly after mowing, which makes it one of the most reliable monarch hosts on the southern plains.", "identification": [ "Flower clusters emerge from the leaf axils along the stem, not just at the tip.", "Leaves with distinctly wavy or crinkled margins.", "Low sprawling growth, frequently in mown roadsides and lawns.", "Hoods are long and slender, projecting well past the corolla." ], "url": "https://milkweedusa.com/species/zizotes-milkweed/", "markdown": "https://milkweedusa.com/species/zizotes-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_oenotheroides", "title": "Asclepias oenotheroides", "extract": "Asclepias oenotheroides, commonly known as zizotes milkweed or sidecluster milkweed, is a plant in the dogbane family. It grows in Central America, Mexico, and several US states." }, "gbif": { "id": 3170282, "url": "https://www.gbif.org/species/3170282", "accepted": "Asclepias oenotheroides Cham. & Schltdl." }, "inaturalist": { "id": 158753, "url": "https://www.inaturalist.org/taxa/158753", "observations": 13539 }, "powo": { "id": "94504-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94504-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20oenotheroides.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20oenotheroides" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20oenotheroides" } }, "photoCount": 8 }, { "slug": "bract-milkweed", "scientificName": "Asclepias brachystephana", "authority": "Engelm. ex Torr.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Bract Milkweed", "Short-crown Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 6, 18 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 4, 5, 6, 7, 8 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "maroon", "purple" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 6, 10 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 2 }, "statesRecorded": [ "AZ", "NM", "TX" ], "summary": "A low desert grassland milkweed with narrow folded leaves and dense clusters of small dusky purple flowers held tight in the leaf axils, common on caliche flats in New Mexico and west Texas.", "identification": [ "Small purple-maroon flowers in compact axillary clusters.", "Narrow leaves, often folded along the midrib and grayish.", "Low sprawling habit on hard calcareous desert soils." ], "url": "https://milkweedusa.com/species/bract-milkweed/", "markdown": "https://milkweedusa.com/species/bract-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_brachystephana", "title": "Asclepias brachystephana", "extract": "Asclepias brachystephana, or bract milkweed, is a species of perennial milkweed native to southeast Arizona to Texas and north and west Mexico. It grows in the desert or dry shrubland biome." }, "gbif": { "id": 3170258, "url": "https://www.gbif.org/species/3170258", "accepted": "Asclepias brachystephana Engelm. ex Torr." }, "inaturalist": { "id": 158733, "url": "https://www.inaturalist.org/taxa/158733", "observations": 938 }, "powo": { "id": "94136-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94136-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20brachystephana.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20brachystephana" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20brachystephana" } }, "photoCount": 8 }, { "slug": "texas-milkweed", "scientificName": "Asclepias texana", "authority": "A. Heller", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Texas Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "white" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "part", "full" ], "usdaZones": [ 7, 9 ], "stratificationDays": 30, "ratings": { "garden": 4, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "NM", "TX" ], "summary": "A refined Edwards Plateau endemic with thin dark green leaves and clean white flower clusters, growing in limestone canyons and creek beds through the Texas Hill Country.", "identification": [ "Pure white flowers in neat rounded clusters.", "Thin, dark green, pointed leaves on a slender branching stem.", "Limestone canyons, seeps and rocky stream banks in central Texas." ], "url": "https://milkweedusa.com/species/texas-milkweed/", "markdown": "https://milkweedusa.com/species/texas-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_texana", "title": "Asclepias texana", "extract": "Asclepias texana, commonly called Texas milkweed, is a species of flowering plant in the dogbane family (Apocynaceae). It is native to North America, where it is widespread in the regions of the Chihuahuan Desert and Edwards Plateau. Its range spans from the states of Durango and Coahuilla in Mexico, north to the state of Texas in the United States. Its natural habitat is in dry rocky areas in can" }, "gbif": { "id": 3170347, "url": "https://www.gbif.org/species/3170347", "accepted": "Asclepias texana A.Heller" }, "inaturalist": { "id": 158762, "url": "https://www.inaturalist.org/taxa/158762", "observations": 1945 }, "powo": { "id": "21305-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21305-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20texana.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20texana" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20texana" } }, "photoCount": 8 }, { "slug": "mojave-milkweed", "scientificName": "Asclepias nyctaginifolia", "authority": "A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Mojave Milkweed", "Four-o’clock Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 6, 18 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 4, 5, 6 ], "peakBloomMonths": [ 5 ], "flowerColors": [ "green", "cream" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AZ", "NM", "NV", "UT" ], "summary": "A low desert milkweed with broad soft leaves like a four-o’clock plant and nodding clusters of green-cream flowers, scattered across sandy flats and washes in the Mojave and northern Sonoran deserts.", "identification": [ "Broad, soft, wavy-margined leaves close to the ground.", "Nodding clusters of pale green flowers on short stalks.", "Sandy desert flats, washes and roadside margins." ], "url": "https://milkweedusa.com/species/mojave-milkweed/", "markdown": "https://milkweedusa.com/species/mojave-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_nyctaginifolia", "title": "Asclepias nyctaginifolia", "extract": "Asclepias nyctaginifolia is a species of milkweed known by the common name Mojave milkweed. It is native to the southwestern United States from California to New Mexico, where it grows mainly in desert habitat. This is a perennial herb growing up to about half a meter in maximum height when erect, but often bending or drooping. The thick leaves are oval to lance-shaped and arranged in opposite pai" }, "gbif": { "id": 3170320, "url": "https://www.gbif.org/species/3170320", "accepted": "Asclepias nyctaginifolia A.Gray" }, "inaturalist": { "id": 62294, "url": "https://www.inaturalist.org/taxa/62294", "observations": 510 }, "powo": { "id": "94494-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94494-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20nyctaginifolia.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20nyctaginifolia" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20nyctaginifolia" } }, "photoCount": 8 }, { "slug": "whitestem-milkweed", "scientificName": "Asclepias albicans", "authority": "S. Watson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Whitestem Milkweed", "White-stemmed Milkweed", "Wax Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 36, 120 ], "spreadInches": [ 24, 48 ], "bloomMonths": [ 1, 2, 3, 4, 5, 11, 12 ], "peakBloomMonths": [ 2, 3, 4 ], "flowerColors": [ "cream", "white" ], "leafArrangement": "opposite", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 9, 11 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AZ", "CA", "NV" ], "summary": "The tallest milkweed in North America: chalk-white, essentially leafless stems rising to ten feet from rocky desert slopes in the Sonoran Desert, tipped with clusters of cream flowers in late winter.", "identification": [ "Very tall, wand-like, waxy white stems in a clump.", "Leaves tiny and quickly deciduous, so the plant looks leafless.", "Blooms in winter and early spring, unusually for the genus." ], "url": "https://milkweedusa.com/species/whitestem-milkweed/", "markdown": "https://milkweedusa.com/species/whitestem-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_albicans", "title": "Asclepias albicans", "extract": "Asclepias albicans is a species of milkweed known by the common names whitestem milkweed and wax milkweed. It is native to the Mojave and Sonoran Deserts of California, Arizona, and Baja California. This is a spindly erect shrub usually growing 1 to 3 meters tall, but known to approach 4 metres. The sticklike branches are mostly naked, the younger ones coated in a waxy residue and a thin layer of " }, "gbif": { "id": 3170348, "url": "https://www.gbif.org/species/3170348", "accepted": "Asclepias albicans S.Watson" }, "inaturalist": { "id": 62299, "url": "https://www.inaturalist.org/taxa/62299", "observations": 1564 }, "powo": { "id": "21135-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21135-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20albicans.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20albicans" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20albicans" } }, "photoCount": 8 }, { "slug": "serpentine-milkweed", "scientificName": "Asclepias solanoana", "authority": "Woodson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Serpentine Milkweed", "Solano Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 4, 10 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 5, 6, 7 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "cream", "pink" ], "leafArrangement": "opposite", "leafShape": "orbicular", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 7, 9 ], "stratificationDays": 60, "ratings": { "garden": 1, "monarch": 1, "nectar": 2 }, "statesRecorded": [ "CA" ], "summary": "A prostrate northern California endemic confined to serpentine barrens, forming flat mats of round gray-green leaves studded with small cream flowers. It grows on soil so metal-rich that almost nothing else survives.", "identification": [ "Completely prostrate mats on bare serpentine rock and soil.", "Round, thick, gray-green leaves pressed to the ground.", "Small cream flowers with pinkish hoods." ], "url": "https://milkweedusa.com/species/serpentine-milkweed/", "markdown": "https://milkweedusa.com/species/serpentine-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_solanoana", "title": "Asclepias solanoana", "extract": "Asclepias solanoana is a rare species of milkweed known by the common names serpentine milkweed, prostrate milkweed, and solanoa. It is endemic to California, where it grows only in the North Coast Ranges north of the San Francisco Bay Area." }, "gbif": { "id": 3170277, "url": "https://www.gbif.org/species/3170277", "accepted": "Asclepias solanoana Woodson" }, "inaturalist": { "id": 62293, "url": "https://www.inaturalist.org/taxa/62293", "observations": 210 }, "powo": { "id": "290390-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:290390-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20solanoana.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20solanoana" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20solanoana" } }, "photoCount": 8 }, { "slug": "welshs-milkweed", "scientificName": "Asclepias welshii", "authority": "N.H. Holmgren & P.K. Holmgren", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Welsh’s Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 18, 48 ], "spreadInches": [ 24, 60 ], "bloomMonths": [ 5, 6, 7 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "cream", "pink" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "rhizome", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 5, 8 ], "stratificationDays": 60, "ratings": { "garden": 1, "monarch": 2, "nectar": 3 }, "statesRecorded": [ "AZ", "UT" ], "summary": "A federally threatened dune endemic known from only a handful of active sand dune systems on the Utah–Arizona border, including the Coral Pink Sand Dunes. Thick woolly gray leaves and creamy flower clusters on plants that survive by growing up through shifting sand.", "identification": [ "Broad, thick, densely white-woolly leaves in well-spaced opposite pairs.", "Creamy-white flowers tinged pink, in dense terminal clusters.", "Grows only in active, shifting sand dunes, so habitat alone identifies it." ], "url": "https://milkweedusa.com/species/welshs-milkweed/", "markdown": "https://milkweedusa.com/species/welshs-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_welshii", "title": "Asclepias welshii", "extract": "Asclepias welshii is a rare species of milkweed known by the common name Welsh's milkweed. It is native to southern Utah and northern Arizona, where there are four known occurrences remaining. Most of the plants occur in Coral Pink Sand Dunes State Park, where the habitat has been degraded in many areas by off-road vehicle use. It is a federally listed threatened species of the United States." }, "gbif": { "id": 3170262, "url": "https://www.gbif.org/species/3170262", "accepted": "Asclepias welshii N.H.Holmgren & P.K.Holmgren" }, "inaturalist": { "id": 158765, "url": "https://www.inaturalist.org/taxa/158765", "observations": 257 }, "powo": { "id": "21339-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21339-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20welshii.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20welshii" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20welshii" } }, "photoCount": 8 }, { "slug": "eastwoods-milkweed", "scientificName": "Asclepias eastwoodiana", "authority": "Barneby", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Eastwood’s Milkweed", "Great Basin Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 6, 14 ], "spreadInches": [ 10, 20 ], "bloomMonths": [ 5, 6 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "maroon", "cream" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 5, 8 ], "stratificationDays": 60, "ratings": { "garden": 1, "monarch": 1, "nectar": 2 }, "statesRecorded": [ "NV" ], "summary": "A Nevada endemic of barren volcanic gravel and clay flats in the central Great Basin, forming low gray-green tufts with dusky maroon and cream flowers. Known from a small number of populations and tracked as a sensitive species.", "identification": [ "Low, tufted habit on bare volcanic or ash-derived soils.", "Greyish, softly hairy, broadly oval leaves.", "Small flowers with maroon corolla lobes and pale cream hoods." ], "url": "https://milkweedusa.com/species/eastwoods-milkweed/", "markdown": "https://milkweedusa.com/species/eastwoods-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_eastwoodiana", "title": "Asclepias eastwoodiana", "extract": "Asclepias eastwoodiana, commonly called Eastwood's milkweed, is a species of dwarf milkweed endemic to Nevada. Its conservation status is G2 (Imperiled). Asclepias eastwoodiana is endemic to Nevada, and most observations are within central Nevada. This plant grows in conifer woodlands, shrubland/chaparral, grasslands, and desert habitats, and at elevations of 1,400–2,200 m (4,600–7,200 ft). Asclep" }, "gbif": { "id": 3578016, "url": "https://www.gbif.org/species/3578016", "accepted": "Asclepias eastwoodiana Barneby" }, "inaturalist": { "id": 541501, "url": "https://www.inaturalist.org/taxa/541501", "observations": 43 }, "powo": { "id": "21182-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21182-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20eastwoodiana.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20eastwoodiana" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20eastwoodiana" } }, "photoCount": 8 }, { "slug": "ruths-milkweed", "scientificName": "Asclepias ruthiae", "authority": "Maguire", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Ruth’s Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 4, 12 ], "spreadInches": [ 10, 24 ], "bloomMonths": [ 4, 5, 6 ], "peakBloomMonths": [ 5 ], "flowerColors": [ "pink", "cream" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 5, 9 ], "stratificationDays": 60, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AZ", "NV", "UT" ], "summary": "A low, spreading Colorado Plateau milkweed of red sand and slickrock country, with small thick leaves and pale pink-cream flowers held close to the ground among the sandstone.", "identification": [ "Prostrate to low-spreading stems radiating from a central taproot.", "Small, thick, blunt leaves, often folded and gray-tinged.", "Pale pink to cream flowers in small clusters near the stem tips." ], "url": "https://milkweedusa.com/species/ruths-milkweed/", "markdown": "https://milkweedusa.com/species/ruths-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_ruthiae", "title": "Asclepias ruthiae", "extract": "Asclepias ruthiae is a species of flowering plant in the family Apocynaceae. It is endemic to Utah in the western United States, where it grows in desert and shrubland habitats." }, "gbif": { "id": 3574177, "url": "https://www.gbif.org/species/3574177", "accepted": "Asclepias ruthiae Maguire" }, "inaturalist": { "id": 898625, "url": "https://www.inaturalist.org/taxa/898625", "observations": 101 }, "powo": { "id": "21286-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21286-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20ruthiae.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20ruthiae" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20ruthiae" } }, "photoCount": 8 }, { "slug": "rusbys-milkweed", "scientificName": "Asclepias rusbyi", "authority": "(Vail) Woodson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Rusby’s Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 10, 20 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "green", "white" ], "leafArrangement": "alternate", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full", "part" ], "usdaZones": [ 5, 9 ], "stratificationDays": 30, "ratings": { "garden": 2, "monarch": 3, "nectar": 2 }, "statesRecorded": [ "AZ", "NM" ], "summary": "A slender milkweed of Arizona and New Mexico pine-oak woodland and mountain grassland, with narrow alternate leaves and small greenish-white flower clusters. It follows the summer monsoon rather than the spring.", "identification": [ "Narrow, alternate, often slightly folded leaves on a wiry upright stem.", "Small greenish-white flowers in loose clusters.", "Ponderosa pine and pine-oak woodland openings above about 5,000 feet." ], "url": "https://milkweedusa.com/species/rusbys-milkweed/", "markdown": "https://milkweedusa.com/species/rusbys-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 3170311, "url": "https://www.gbif.org/species/3170311", "accepted": "Asclepias rusbyi (Vail) Woodson" }, "inaturalist": { "id": 158758, "url": "https://www.inaturalist.org/taxa/158758", "observations": 67 }, "powo": { "id": "21285-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21285-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20rusbyi.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20rusbyi" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20rusbyi" } }, "photoCount": 7 }, { "slug": "lemmons-milkweed", "scientificName": "Asclepias lemmonii", "authority": "A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Lemmon’s Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 8, 24 ], "spreadInches": [ 8, 18 ], "bloomMonths": [ 7, 8, 9 ], "peakBloomMonths": [ 8 ], "flowerColors": [ "green", "purple" ], "leafArrangement": "opposite", "leafShape": "lanceolate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "part", "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AZ", "NM" ], "summary": "A slim sky-island milkweed of shaded canyon bottoms in southeastern Arizona and southwestern New Mexico, with small green flowers flushed purple, appearing after the summer rains.", "identification": [ "Slender stems in moist canyon shade rather than open desert.", "Small green flowers tinged with dull purple, few per cluster.", "Restricted to the higher sky-island ranges near the Mexican border." ], "url": "https://milkweedusa.com/species/lemmons-milkweed/", "markdown": "https://milkweedusa.com/species/lemmons-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 3170287, "url": "https://www.gbif.org/species/3170287", "accepted": "Asclepias lemmonii A.Gray" }, "inaturalist": { "id": 158746, "url": "https://www.inaturalist.org/taxa/158746", "observations": 363 }, "powo": { "id": "94393-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94393-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20lemmonii.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20lemmonii" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20lemmonii" } }, "photoCount": 8 }, { "slug": "mahogany-milkweed", "scientificName": "Asclepias hypoleuca", "authority": "(A. Gray) Woodson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Mahogany Milkweed", "White-leaf Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 6, 7, 8, 9 ], "peakBloomMonths": [ 7, 8 ], "flowerColors": [ "maroon", "cream" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "part", "full" ], "usdaZones": [ 6, 9 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AZ", "NM" ], "summary": "A handsome sky-island milkweed whose broad leaves are conspicuously white beneath, carrying nodding clusters of deep mahogany-red flowers with pale cream hoods through the monsoon season.", "identification": [ "Leaf undersides distinctly white or chalky, which is the giveaway character.", "Flowers rich mahogany-brown to maroon with contrasting cream hoods.", "Oak woodland and canyon slopes in the Arizona and New Mexico mountains." ], "url": "https://milkweedusa.com/species/mahogany-milkweed/", "markdown": "https://milkweedusa.com/species/mahogany-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 3170298, "url": "https://www.gbif.org/species/3170298", "accepted": "Asclepias hypoleuca (A.Gray) Woodson" }, "inaturalist": { "id": 158742, "url": "https://www.inaturalist.org/taxa/158742", "observations": 219 }, "powo": { "id": "21202-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21202-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20hypoleuca.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20hypoleuca" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20hypoleuca" } }, "photoCount": 8 }, { "slug": "nodding-milkweed", "scientificName": "Asclepias glaucescens", "authority": "Kunth", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Nodding Milkweed", "Glaucous Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 36 ], "spreadInches": [ 12, 24 ], "bloomMonths": [ 6, 7, 8, 9 ], "peakBloomMonths": [ 7, 8 ], "flowerColors": [ "green", "white" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry", "medium" ], "light": [ "part", "full" ], "usdaZones": [ 6, 10 ], "stratificationDays": 30, "ratings": { "garden": 3, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AZ", "NM" ], "summary": "A stout borderland milkweed with thick blue-gray leaves and heavy nodding clusters of greenish-white flowers, growing in oak woodland and canyon grassland in the Arizona and New Mexico sky islands.", "identification": [ "Thick, waxy, distinctly blue-gray (glaucous) leaves.", "Flower clusters nod downward on stout stalks.", "Sturdier and broader-leaved than the other borderland species." ], "url": "https://milkweedusa.com/species/nodding-milkweed/", "markdown": "https://milkweedusa.com/species/nodding-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 3170302, "url": "https://www.gbif.org/species/3170302", "accepted": "Asclepias glaucescens Kunth" }, "inaturalist": { "id": 158740, "url": "https://www.inaturalist.org/taxa/158740", "observations": 1075 }, "powo": { "id": "94322-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94322-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20glaucescens.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20glaucescens" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20glaucescens" } }, "photoCount": 8 }, { "slug": "slimpod-milkweed", "scientificName": "Asclepias quinquedentata", "authority": "A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Slimpod Milkweed", "Fivetooth Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 12, 30 ], "spreadInches": [ 8, 16 ], "bloomMonths": [ 7, 8, 9 ], "peakBloomMonths": [ 8 ], "flowerColors": [ "cream", "green" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "part", "full" ], "usdaZones": [ 6, 9 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "AZ", "NM" ], "summary": "A slight, wiry milkweed of Arizona and New Mexico mountain woodland with very narrow leaves and small cream-green flowers, producing the exceptionally slim pods that give it its name.", "identification": [ "Very narrow opposite leaves on thin, often leaning stems.", "Small cream to greenish flowers in sparse clusters.", "Pods notably slender and pencil-thin." ], "url": "https://milkweedusa.com/species/slimpod-milkweed/", "markdown": "https://milkweedusa.com/species/slimpod-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 3170234, "url": "https://www.gbif.org/species/3170234", "accepted": "Asclepias quinquedentata A.Gray" }, "inaturalist": { "id": 158757, "url": "https://www.inaturalist.org/taxa/158757", "observations": 21 }, "powo": { "id": "94582-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94582-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20quinquedentata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20quinquedentata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20quinquedentata" } }, "photoCount": 8 }, { "slug": "tufted-milkweed", "scientificName": "Asclepias nummularia", "authority": "Torr.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Tufted Milkweed", "Roundleaf Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 2, 8 ], "spreadInches": [ 6, 14 ], "bloomMonths": [ 4, 5, 6, 7, 8 ], "peakBloomMonths": [ 5 ], "flowerColors": [ "cream", "green" ], "leafArrangement": "opposite", "leafShape": "orbicular", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 1, "nectar": 2 }, "statesRecorded": [ "AZ" ], "summary": "One of the smallest milkweeds in North America, a low tuft of tiny round woolly leaves on rocky Arizona desert slopes, easy to walk past even in flower.", "identification": [ "Tiny, nearly circular, densely hairy leaves.", "Whole plant usually under six inches tall.", "Rocky slopes and desert grassland in central and southern Arizona." ], "url": "https://milkweedusa.com/species/tufted-milkweed/", "markdown": "https://milkweedusa.com/species/tufted-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 3170341, "url": "https://www.gbif.org/species/3170341", "accepted": "Asclepias nummularia Torr." }, "inaturalist": { "id": 158751, "url": "https://www.inaturalist.org/taxa/158751", "observations": 376 }, "powo": { "id": "94488-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94488-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20nummularia.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20nummularia" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20nummularia" } }, "photoCount": 8 }, { "slug": "emorys-milkweed", "scientificName": "Asclepias emoryi", "authority": "(Greene) Vail", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Emory’s Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 4, 14 ], "spreadInches": [ 10, 22 ], "bloomMonths": [ 4, 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 5, 9 ], "flowerColors": [ "green", "cream" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 7, 10 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 3, "nectar": 2 }, "statesRecorded": [ "NM", "TX" ], "summary": "A low, wiry Chihuahuan Desert milkweed of gypsum and caliche flats in west Texas and southern New Mexico, flowering greenish-cream after any decent rain.", "identification": [ "Low sprawling stems with narrow, often folded opposite leaves.", "Small greenish flowers in compact clusters.", "Gypsum, caliche and other harsh calcareous desert soils." ], "url": "https://milkweedusa.com/species/emorys-milkweed/", "markdown": "https://milkweedusa.com/species/emorys-milkweed/index.md", "references": { "wikipedia": null, "gbif": { "id": 8076255, "url": "https://www.gbif.org/species/8076255", "accepted": "Asclepias emoryi (Greene) Tidestr." }, "inaturalist": { "id": 158737, "url": "https://www.inaturalist.org/taxa/158737", "observations": 190 }, "powo": { "id": "21184-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21184-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20emoryi.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20emoryi" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20emoryi" } }, "photoCount": 8 }, { "slug": "prostrate-milkweed", "scientificName": "Asclepias prostrata", "authority": "W.H. Blackwell", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Prostrate Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 2, 6 ], "spreadInches": [ 8, 20 ], "bloomMonths": [ 3, 4, 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 4, 5 ], "flowerColors": [ "green", "white" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 8, 10 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "TX" ], "summary": "A federally endangered milkweed known from a few sites in the south Texas brush country, growing completely flat against gravelly ground with small greenish-white flowers. It was listed under the Endangered Species Act in 2023.", "identification": [ "Entirely prostrate, with stems lying flat on bare gravelly soil.", "Small narrow opposite leaves and tiny greenish-white flowers.", "Known only from Starr and Zapata counties in south Texas and adjacent Mexico." ], "url": "https://milkweedusa.com/species/prostrate-milkweed/", "markdown": "https://milkweedusa.com/species/prostrate-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_prostrata", "title": "Asclepias prostrata", "extract": "Asclepias prostrata, commonly known as prostrate milkweed, is a species of perennial plant in the genus Asclepias. It has triangular to elliptical foliage with wavy margins, stems up to 16 inches (410 mm) long, and grows low to the ground in sandy soils. Flowering may be dependent on rainfall to bring the plant out of dormancy, but is most typical from April to October. Like other milkweeds, A. pr" }, "gbif": { "id": 3170330, "url": "https://www.gbif.org/species/3170330", "accepted": "Asclepias prostrata W.H.Blackw." }, "inaturalist": { "id": 158755, "url": "https://www.inaturalist.org/taxa/158755", "observations": 124 }, "powo": { "id": "21269-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21269-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20prostrata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20prostrata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20prostrata" } }, "photoCount": 8 }, { "slug": "sperrys-milkweed", "scientificName": "Asclepias sperryi", "authority": "Woodson", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Sperry’s Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 8, 20 ], "spreadInches": [ 8, 18 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6 ], "flowerColors": [ "cream", "green" ], "leafArrangement": "opposite", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 7, 9 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "TX" ], "summary": "A rare Trans-Pecos endemic of limestone ridges and rocky slopes in far west Texas, with thread-fine leaves and small cream flowers, known from very few localities.", "identification": [ "Thread-fine opposite leaves on slender clustered stems.", "Small cream-green flowers in sparse terminal clusters.", "Limestone slopes and ridges in the Trans-Pecos." ], "url": "https://milkweedusa.com/species/sperrys-milkweed/", "markdown": "https://milkweedusa.com/species/sperrys-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_sperryi", "title": "Asclepias sperryi", "extract": "Asclepias sperryi is a species of flowering plant in the family Apocynaceae. It is native to southwestern Texas in the United States and adjacent northeastern Mexico (Coahuila), where it occurs in desert and dry shrubland habitats." }, "gbif": { "id": 3170239, "url": "https://www.gbif.org/species/3170239", "accepted": "Asclepias sperryi Woodson" }, "inaturalist": { "id": 158759, "url": "https://www.inaturalist.org/taxa/158759", "observations": 2 }, "powo": { "id": "21294-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:21294-2" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20sperryi.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20sperryi" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20sperryi" } }, "photoCount": 1 }, { "slug": "curtiss-milkweed", "scientificName": "Asclepias curtissii", "authority": "A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Curtiss’ Milkweed", "Curtiss’ Sandhill Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 12, 36 ], "spreadInches": [ 10, 20 ], "bloomMonths": [ 4, 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "white", "green" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full", "part" ], "usdaZones": [ 8, 10 ], "stratificationDays": 0, "ratings": { "garden": 2, "monarch": 3, "nectar": 2 }, "statesRecorded": [ "FL" ], "summary": "A Florida scrub endemic listed as endangered by the state, with wavy-edged pale leaves and greenish-white flowers, restricted to the ancient sand ridges of the peninsula.", "identification": [ "Wavy-margined, pale gray-green leaves in widely spaced pairs.", "Greenish-white flowers in open terminal clusters.", "Only in Florida scrub and sandhill on relict dune ridges." ], "url": "https://milkweedusa.com/species/curtiss-milkweed/", "markdown": "https://milkweedusa.com/species/curtiss-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_curtissii", "title": "Asclepias curtissii", "extract": "Asclepias curtissii, or Curtiss's milkweed, is a rare species of flowering milkweed that is endemic to Florida's sandy areas. Curtiss's milkweed belongs to the subfamily Asclepiadoideae and the genus Asclepias. This dicotyledonous, perennial plant was placed on the endangered species list by the state of Florida to protect this rare milkweed. Although Curtiss milkweed is found all over Florida, th" }, "gbif": { "id": 3170342, "url": "https://www.gbif.org/species/3170342", "accepted": "Asclepias curtissii A.Gray" }, "inaturalist": { "id": 146969, "url": "https://www.inaturalist.org/taxa/146969", "observations": 935 }, "powo": { "id": "94214-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94214-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20curtissii.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20curtissii" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20curtissii" } }, "photoCount": 8 }, { "slug": "feays-milkweed", "scientificName": "Asclepias feayi", "authority": "Chapm. ex A. Gray", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Feay’s Milkweed", "Florida Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 8, 24 ], "spreadInches": [ 8, 16 ], "bloomMonths": [ 4, 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "white", "pink" ], "leafArrangement": "opposite", "leafShape": "threadlike", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 8, 10 ], "stratificationDays": 0, "ratings": { "garden": 3, "monarch": 3, "nectar": 2 }, "statesRecorded": [ "FL" ], "summary": "A Florida endemic of pine flatwoods and sandhill with hair-fine leaves and delicate white flowers flushed pink, so slender that the plant almost disappears into the wiregrass.", "identification": [ "Extremely fine, thread-like opposite leaves.", "Small white flowers with a pink or lavender tinge, in airy clusters.", "Florida pine flatwoods, sandhill and dry prairie, statewide except the far west." ], "url": "https://milkweedusa.com/species/feays-milkweed/", "markdown": "https://milkweedusa.com/species/feays-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_feayi", "title": "Asclepias feayi", "extract": "Asclepias feayi is a species of milkweed endemic to Florida. Its common name is Florida milkweed. It is in the family Apocynaceae." }, "gbif": { "id": 3170275, "url": "https://www.gbif.org/species/3170275", "accepted": "Asclepias feayi Chapm. ex A.Gray" }, "inaturalist": { "id": 143039, "url": "https://www.inaturalist.org/taxa/143039", "observations": 736 }, "powo": { "id": "94274-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94274-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20feayi.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20feayi" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20feayi" } }, "photoCount": 8 }, { "slug": "savannah-milkweed", "scientificName": "Asclepias pedicellata", "authority": "Walter", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Savannah Milkweed", "Stalked Milkweed" ], "nativeToUS": true, "conservationFlag": null, "heightInches": [ 6, 18 ], "spreadInches": [ 6, 12 ], "bloomMonths": [ 4, 5, 6, 7, 8, 9 ], "peakBloomMonths": [ 5, 6 ], "flowerColors": [ "yellow", "green" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "wet", "medium" ], "light": [ "full" ], "usdaZones": [ 8, 10 ], "stratificationDays": 0, "ratings": { "garden": 2, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "FL", "GA" ], "summary": "A small, easily overlooked coastal plain milkweed with narrow leaves and a few pale greenish-yellow flowers on long stalks, growing in damp pine savanna and flatwoods.", "identification": [ "Very few flowers per plant, each on a conspicuously long stalk.", "Pale greenish-yellow flowers, unusual in the genus.", "Damp pine savanna and flatwoods on the coastal plain." ], "url": "https://milkweedusa.com/species/savannah-milkweed/", "markdown": "https://milkweedusa.com/species/savannah-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_pedicellata", "title": "Asclepias pedicellata", "extract": "Asclepias pedicellata is a type of milkweed. A perennial herb, it has yellow or green flowers. Its common name is savannah milkweed." }, "gbif": { "id": 3170245, "url": "https://www.gbif.org/species/3170245", "accepted": "Asclepias pedicellata Walter" }, "inaturalist": { "id": 158754, "url": "https://www.inaturalist.org/taxa/158754", "observations": 1884 }, "powo": { "id": "94531-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94531-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20pedicellata.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20pedicellata" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20pedicellata" } }, "photoCount": 8 }, { "slug": "southern-milkweed", "scientificName": "Asclepias viridula", "authority": "Chapm.", "genus": "Asclepias", "family": "Apocynaceae", "commonNames": [ "Southern Milkweed" ], "nativeToUS": true, "conservationFlag": "rare or protected in part of range", "heightInches": [ 12, 30 ], "spreadInches": [ 8, 14 ], "bloomMonths": [ 5, 6, 7, 8 ], "peakBloomMonths": [ 6, 7 ], "flowerColors": [ "green", "white" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "fibrous", "soilMoisture": [ "wet" ], "light": [ "full" ], "usdaZones": [ 8, 9 ], "stratificationDays": 30, "ratings": { "garden": 1, "monarch": 2, "nectar": 2 }, "statesRecorded": [ "FL", "GA" ], "summary": "A rare wet-savanna milkweed of the Florida panhandle and south Georgia, with narrow leaves and small greenish-white flowers, tracked as threatened across its small range.", "identification": [ "Slender upright stems in permanently damp pine savanna and bog edges.", "Small greenish-white flowers in sparse clusters.", "Restricted to the eastern Gulf coastal plain." ], "url": "https://milkweedusa.com/species/southern-milkweed/", "markdown": "https://milkweedusa.com/species/southern-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Asclepias_viridula", "title": "Asclepias viridula", "extract": "Asclepias viridula, commonly known as southern milkweed, is a species of milkweed (Asclepias) genus in the Apocynaceae family. It is a perennial found in Florida, Georgia, and Alabama. It grows in the Florida panhandle. Its flowers are white or green." }, "gbif": { "id": 3170279, "url": "https://www.gbif.org/species/3170279", "accepted": "Asclepias viridula Chapm." }, "inaturalist": { "id": 158764, "url": "https://www.inaturalist.org/taxa/158764", "observations": 68 }, "powo": { "id": "94738-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:94738-1" }, "bonap": { "url": "https://bonap.net/MapGallery/County/Asclepias%20viridula.png" }, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Asclepias%20viridula" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Asclepias%20viridula" } }, "photoCount": 7 }, { "slug": "balloon-plant", "scientificName": "Gomphocarpus physocarpus", "authority": "E. Mey.", "genus": "Gomphocarpus", "family": "Apocynaceae", "commonNames": [ "Balloon Plant", "Hairy Balls", "Swan Plant", "Balloon Cotton Bush" ], "nativeToUS": false, "conservationFlag": null, "heightInches": [ 36, 72 ], "spreadInches": [ 24, 48 ], "bloomMonths": [ 5, 6, 7, 8, 9, 10 ], "peakBloomMonths": [ 7, 8 ], "flowerColors": [ "white", "cream" ], "leafArrangement": "opposite", "leafShape": "narrow", "sap": "milky", "rootSystem": "fibrous", "soilMoisture": [ "medium" ], "light": [ "full" ], "usdaZones": [ 8, 11 ], "stratificationDays": 0, "ratings": { "garden": 3, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AL", "CA", "FL", "GA", "HI", "LA", "MS", "SC", "TX" ], "summary": "Not a true milkweed but a close African relative, grown everywhere for its extraordinary inflated, bristly, balloon-like pods. Monarchs will use it as a host, and in frost-free regions it raises exactly the same winter-breeding concerns as tropical milkweed.", "identification": [ "Pods are pale green spheres covered in soft bristles, unmistakable and unlike any Asclepias.", "Small waxy white flowers hanging in nodding clusters.", "Tall, shrubby, softly hairy stems with narrow willow-like leaves." ], "url": "https://milkweedusa.com/species/balloon-plant/", "markdown": "https://milkweedusa.com/species/balloon-plant/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Gomphocarpus_physocarpus", "title": "Gomphocarpus physocarpus", "extract": "Gomphocarpus physocarpus is a species of flowering plant in the Milkweed subfamily, Asclepiadoideae, and Dogbane Family Apocynaceae. It is commonly known as hairy balls, balloonplant, balloon cotton-bush, bishop's balls, nailhead, or swan plant. The plant is native to southeast Africa, but it has been widely naturalised as it is often used as an ornamental plant." }, "gbif": { "id": 3170326, "url": "https://www.gbif.org/species/3170326", "accepted": "Gomphocarpus physocarpus E.Mey." }, "inaturalist": { "id": 281273, "url": "https://www.inaturalist.org/taxa/281273", "observations": 12448 }, "powo": { "id": "97670-1", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:97670-1" }, "bonap": null, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Gomphocarpus%20physocarpus" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Gomphocarpus%20physocarpus" } }, "photoCount": 8 }, { "slug": "giant-milkweed", "scientificName": "Calotropis procera", "authority": "(Aiton) W.T. Aiton", "genus": "Calotropis", "family": "Apocynaceae", "commonNames": [ "Giant Milkweed", "Rooster Tree", "Sodom Apple", "Calotrope" ], "nativeToUS": false, "conservationFlag": null, "heightInches": [ 72, 144 ], "spreadInches": [ 48, 96 ], "bloomMonths": [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ], "peakBloomMonths": [ 3, 4, 10 ], "flowerColors": [ "white", "purple" ], "leafArrangement": "opposite", "leafShape": "ovate", "sap": "milky", "rootSystem": "taproot", "soilMoisture": [ "dry" ], "light": [ "full" ], "usdaZones": [ 9, 11 ], "stratificationDays": 0, "ratings": { "garden": 2, "monarch": 3, "nectar": 3 }, "statesRecorded": [ "AZ", "CA", "FL", "HI", "TX" ], "summary": "A large shrub or small tree from Africa and Asia, naturalised in the warmest parts of the United States. Its huge blue-gray leaves and waxy purple-tipped white flowers make it a striking plant, and monarchs and queens use it as a host, but it is invasive on disturbed dry ground.", "identification": [ "Shrub or small tree to twelve feet, far larger than any native milkweed.", "Very large, thick, blue-gray leaves clasping stout woody stems.", "Waxy white flowers with five purple-tipped lobes, in dense clusters.", "Sap is copious, thick and strongly irritant." ], "url": "https://milkweedusa.com/species/giant-milkweed/", "markdown": "https://milkweedusa.com/species/giant-milkweed/index.md", "references": { "wikipedia": { "url": "https://en.wikipedia.org/wiki/Calotropis_procera", "title": "Calotropis procera", "extract": "Calotropis procera is a species of flowering plant in the family Apocynaceae that is native to Northern and Tropical Africa, Western Asia, South Asia and Indochina. It typically reaches a height between 6 feet (1.8 m) to 8 feet (2.4 m), and rarely to as high as 15 feet (4.6 m), and grows in sunny to partly-shaded habitats such as disturbed and overgrazed lands, rangeland, roadsides, river flats an" }, "gbif": { "id": 5414566, "url": "https://www.gbif.org/species/5414566", "accepted": "Calotropis procera (Aiton) W.T.Aiton" }, "inaturalist": { "id": 120917, "url": "https://www.inaturalist.org/taxa/120917", "observations": 16481 }, "powo": { "id": "1004515-2", "url": "https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:1004515-2" }, "bonap": null, "natureserve": { "url": "https://explorer.natureserve.org/Search?searchTerm=Calotropis%20procera" }, "wfo": { "url": "https://www.worldfloraonline.org/search?query=Calotropis%20procera" } }, "photoCount": 8 } ] }