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