Asclepias syriaca Linnaeus. Common Milkweed. Phen: Jun-Aug; Jul-Sep. Hab: Prairies, floodplains, pastures, roadsides, disturbed areas. Dist: NB and ME west to s. MB and ND, south to SC, GA, c. TN (Chester, Wofford, & Kral 1997), AR, OK, and KS, the southern range expansion recent. This species is apparently expanding its range southward; see Wyatt et al. (1993) and Wyatt (1996) for discussion.

Origin/Endemic status: Native

Synonymy: = Ar, C, FNA14, GrPl, K1, K3, K4, Mi, Mo2, NE, NY, Ok, Pa, RAB, S, Tat, Tn, Va, W, Woodson (1954); > Asclepias syriaca L. var. kansana (Vail) Palmer & Steyerm. – F, G, Il; > Asclepias syriaca L. var. syriaca – F, G, Il

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: UPL
• Eastern Mountains and Piedmont: FACU
• Great Plains: UPL
• Midwest: FACU
• Northcentral & Northeast: UPL

Heliophily: 8