Helianthus grosseserratus M. Martens. Phen: Jul-Oct. Hab: Prairies, fens, pastures, roadsides, disturbed areas. Dist: The original range of this species was apparently centered in OH, IN, IL, IA, and MO, but its exact extent is obscured by its subsequent spread. Reported for NC by Matthews & Mellichamp (1989).
Origin/Endemic status: Native
Synonymy: = Ar, C, F, FNA21, G, GrPl, Il, K1, K3, K4, Mi, NcTx, NE, NY, Oh3, Pa, Tn, Va, W, WV; = Helianthus grosse-serratus – S, SE1, Tx, orthographic variant; = n/a – RAB