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Apocynaceae
Asclepias

Asclepias subverticillata (A. Gray) Vail. Common name: Horsetail Milkweed, Poison Milkweed. Phenology: (Apr-) May-Oct; (Jun-) Jul-Dec. Habitat: Prairies, disturbed areas. Distribution: Native from w. KS, s. WY, s. ID south to w. TX, NM, AZ, and s. Mexico; reported scattered occurrences eastwards of that area are either definitely introductions as waifs (MO), possibly so (nc. TX, se. TX, s. TX), or possibly misidentifications.

Glossary (beta!)

Origin/Endemic status: Native

Synonymy ⓘ: = FNA14, GrPl, Mex, Mo2, Tx, Woodson (1954); = n/a — C, F. Basionym: Asclepias verticillata L. var. subverticillata A.Gray 1876

Links to other floras: = Asclepias subverticillata - FNA14

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACU
  • Great Plains: FACU
  • Midwest: FACU

Heliophily ⓘ: 9

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image of plant© Alan Cressler: Asclepias subverticillata, Colorado River, Lower Glenwood Canyon, near Glenwood Springs, Garfield County, Colorado 1 by Alan Cressler source | Original Image ⭷
image of plant© Alan Cressler: Asclepias subverticillata, San Rafael Swell, BLM Lands, Emery County, Utah 2 by Alan Cressler source
image of plant© Alan Cressler: Asclepias subverticillata, Colorado River, Lower Glenwood Canyon, near Glenwood Springs, Garfield County, Colorado 2 by Alan Cressler source
image of plant© Alan Cressler: Asclepias subverticillata, Wetherill Mesa, Mesa Verde National Park, Montezuma County, Colorado 2 by Alan Cressler source

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Horticultural Information

No horticultural data found for this taxon.

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