Bidens laevis (Linnaeus) Britton, Sterns, & Poggenburg. Showy Bur-marigold. Phen: Aug-Nov. Hab: Marshes, stream banks, ditches. Dist: ME, NY, IN, MO, NV, and CA southward.

Origin/Endemic status: Native

Synonymy: = Ar, C, F, Fl7, FNA21, G, GW2, Il, K1, K3, K4, Mex, NcTx, NE, NY, Ok, Pa, RAB, SE1, Tn, Va, W, WH3, Sherff & Alexander (1955); < Bidens cernua L. – Oh3; > Bidens laevis (L.) Britton, Sterns, & Poggenb. – S; > Bidens nashii Small – S

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