Plants — 23,046 Species
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Asclepias exaltata L.
Asclepias exaltata L.
Asclepias exaltata, or poke milkweed, is a native eastern North American flowering plant in the dogbane family.
Asclepias fascicularis Decne.
Asclepias fascicularis Decne.
Asclepias fascicularis is a western North American perennial milkweed cultivated as an ornamental for gardens.
Asclepias feayi Chapm. ex A.Gray
Asclepias feayi Chapm. ex A.Gray
Asclepias feayi, or Florida milkweed, is an Apocynaceae milkweed species endemic to Florida.
Asclepias hirtella (Pennell) Woodson
Asclepias hirtella (Pennell) Woodson
Asclepias hirtella is a tall perennial milkweed, an uncommon prairie native across parts of the central US and Canada.
Asclepias humistrata Walter
Asclepias humistrata Walter
Asclepias humistrata Walter is a flowering milkweed endemic to the southeastern US, found in sandy and disturbed habitats.
Asclepias incarnata L.
Asclepias incarnata L.
Asclepias incarnata (swamp milkweed) is a wetland milkweed widely planted to support monarch butterfly populations.
Asclepias lanceolata Walter
Asclepias lanceolata Walter
Asclepias lanceolata, or fewflower milkweed, is a North American perennial milkweed that hosts monarch butterfly larvae and has limited edible and medicinal uses.
Asclepias lanuginosa Nutt.
Asclepias lanuginosa Nutt.
Asclepias lanuginosa is a perennial herbaceous flowering milkweed native to central Canada and the upper Midwest US.
Asclepias latifolia (Torr.) Raf.
Asclepias latifolia (Torr.) Raf.
Asclepias latifolia, or broadleaf milkweed, is a poisonous perennial milkweed native to the southwestern United States.
Asclepias linaria Cav.
Asclepias linaria Cav.
Asclepias linaria, or pineneedle milkweed, is a desert native milkweed and monarch butterfly larval host with high cardenolide content that reduces OE parasite impact.
Asclepias longifolia Michx.
Asclepias longifolia Michx.
Asclepias longifolia (longleaf milkweed) is a rare flowering plant native to the southern US, presumed extinct in Delaware.
Asclepias nyctaginifolia A.Gray
Asclepias nyctaginifolia A.Gray
Asclepias nyctaginifolia, or Mojave milkweed, is a hairy perennial milkweed native to desert areas of the southwestern US.
Asclepias oenotheroides Cham. & Schltdl.
Asclepias oenotheroides Cham. & Schltdl.
Zizotes milkweed (Asclepias oenotheroides) is a small North/Central American perennial milkweed that is a key US southern monarch host.
Asclepias pedicellata Walter
Asclepias pedicellata Walter
Asclepias pedicellata, the savannah milkweed, is a perennial herb milkweed with yellow or green flowers.
Asclepias perennis Walter
Asclepias perennis Walter
Asclepias perennis, aquatic milkweed, is a cold-hardy perennial host for monarch butterflies adapted to wet habitats.
Asclepias purpurascens L.
Asclepias purpurascens L.
Purple milkweed (Asclepias purpurascens) is a shade-preferring milkweed native to parts of the United States that supports insects and is grown in butterfly gardens.
Asclepias quadrifolia Jacq.
Asclepias quadrifolia Jacq.
Asclepias quadrifolia, fourleaf milkweed, is a small perennial woodland milkweed toxic in large doses, rare in cultivation.
Asclepias rubra L.
Asclepias rubra L.
Gray used 'founded upon' for Clayton 263 (BM), Woodson indicated 310.39 (LINN) as the type of Asclepias rubra L., but the sheet lacks a key number and is post - 1753 addition, not original material.
Asclepias speciosa Torr.
Asclepias speciosa Torr.
Asclepias speciosa is a North American perennial milkweed, a key host plant for monarch butterflies, with some traditional human uses.
Asclepias stenophylla A.Gray
Asclepias stenophylla A.Gray
Asclepias stenophylla (slimleaf milkweed) is a herbaceous perennial milkweed native to the central U.S. Great Plains region.
Asclepias subulata Decne.
Asclepias subulata Decne.
Asclepias subulata, or rush/desert milkweed, is a native North American desert perennial milkweed that hosts monarch and queen butterfly larvae.
Asclepias subverticillata (A.Gray) Vail
Asclepias subverticillata (A.Gray) Vail
Asclepias subverticillata is a toxic North American milkweed with documented traditional uses among the Zuni people.
Asclepias sullivantii Engelm. ex A.Gray
Asclepias sullivantii Engelm. ex A.Gray
Asclepias sullivantii, Sullivant's milkweed, is a threatened perennial prairie plant that hosts monarch caterpillars.
Asclepias syriaca L.
Asclepias syriaca L.
Asclepias syriaca is a key milkweed food source for monarch butterflies, cultivated for pollinator habitat and with historical uses.
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