Asclepias syriaca (USA)

Asclepias syriaca L., Sp. Pl. ed. 2: 214 (1762). (syn: Asclepias apocinum Gaterau; Asclepias cornuti Decne.; Asclepias globosa Stokes; Asclepias grandifolia Bertol.; Asclepias illinoensis Michx. ex Steud.; Asclepias intermedia Vail; Asclepias kansana Vail; Asclepias pubescens Moench (ambiguous synonym); Asclepias pubigera Dumort.; Asclepias serica Rafin.; Asclepias syriaca var. kansana (Vail) E. J. Palmer & Steyerm.);

C. & E. Canada to C. & E. U.S.A. as per WCSP;

USA (Alabama, Arkansas, Connecticut, District of Columbia, Delaware, Georgia,
Iowa, Illinois, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maryland,
Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina,
North Dakota, Nebraska, New Hampshire, New Jersey, New York, Ohio, Oklahoma,
Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee,
Texas, Virginia, Vermont, Wisconsin, West Virginia), Canada (Manitoba, New
Brunswick, Nova Scotia, Ontario, Prince Edward Isl., Quebec, Saskatchewan),
France (I), Corsica (I), Spain (I), Germany (I), Italy (I), Slovenia (I),
Croatia (I), Bosnia & Hercegovina (I), Bulgaria (I), Austria (I), Czech
Republic (I), Slovakia (I), Switzerland (I), Hungary (I), Romania (I), Belarus
(I), Crimea (I), Ukraine (I), Northern Caucasus (I), Transcaucasus (I),
Kyrgyzstan (I), Lithuania (I), Bioko Isl. (Fernando Poo) (I) as per Catalogue of Life;