Asclepias perennis Walter. Smoothseed Milkweed, Swamp-forest Milkweed. Phen: (Apr-) Jun-Aug; Aug-Sep. Hab: Cypress-gum swamps, bottomland hardwood forests, marshes. Dist: Se. NC south to c. peninsular FL, west to e. TX, north in the interior to s. IN and s. IL.
Origin/Endemic status: Endemic
Syn: = Ar, C, F, Fl5, G, GW2, Il, K1, K3, K4, Mo2, NcTx, RAB, S, Tn, Tx, WH3, Woodson (1954)