Asclepias speciosa Torrey. Showy Milkweed. Phen: (Apr-) May-Sep; Jul-Oct. Hab: Floodplains and margins of streams and lakes, moist prairies, weedy in disturbed areas. Dist: MN west to BC, south to c. OK, n. TX, NM, AZ, and CA.
ID notes: A western North American sibling of Asclepias syriaca, and reminiscent of it. The two species hybridize extensively northwest of our region.
Origin/Endemic status: Native
Synonymy ⓘ: = C, F, FNA14, GrPl, K3, K4, Mi, Mo2, Ok, Tx
Links to other floras: = Asclepias speciosa - FNA14
Wetland Indicator Status:
- Eastern Mountains and Piedmont: FAC
- Great Plains: FAC
- Midwest: FAC
- Northcentral & Northeast: FAC
Heliophily ⓘ: 8
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© Alan Cressler: Asclepias speciosa, Devils Tower National Monument, Crook County, Wyoming 1 by Alan Cressler source | Original Image ⭷
© Alan Cressler: Asclepias speciosa, Big Thompson River Valley, Moraine Park, Rocky Mountain National Park, Larimer County, Colorado 1 by Alan Cressler source
© Alan Cressler: Asclepias speciosa, Big Thompson River Valley, Moraine Park, Rocky Mountain National Park, Larimer County, Colorado 2 by Alan Cressler sourceFeedback
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Horticultural Information
No horticultural data found for this taxon.