*Bidens pilosa Linnaeus. Hab: Disturbed areas, ballast, waste areas near wool-combing mill. Dist: Native of tropical America. Reported for NC (Kartesz 1999), perhaps based on confusion with B. alba; known from ballast in se. PA (Rhoads & Klein 1993).
Origin/Endemic status: Neotropics
Synonymy: = Fl7, K1, NE, WH3; = n/a – C, F, Pa; < Bidens pilosa L. – FNA21, K3, K4, RAB; > Bidens pilosa L. var. bimucronata (Turczaninov) Sch.-Bip. – Sherff & Alexander (1955); > Bidens pilosa L. var. pilosa – Sherff & Alexander (1955)