Asclepias tuberosa Linnaeus var. tuberosa . Eastern Butterflyweed. Phen: Apr-Sep (-Oct); Jul-Oct. Hab: Woodland margins, roadsides, pastures. Dist: S. NH west to OH, south to Panhandle FL and e. TX.

Origin/Endemic status: Native

Synonymy: = C, Tn, Va; = Asclepias tuberosa L. ssp. tuberosa – FNA14, G, K1, K3, K4, NE, RAB, Woodson (1954); = n/a – Il; > Asclepias decumbens L. – S; < Asclepias tuberosa L. – F, Fl5, NY, Pa, Tat, W, WH3; >< Asclepias tuberosa L. – S

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Heliophily: 8