Rudbeckia triloba Linnaeus var. triloba . Phen: Jul-Oct. Hab: Moist forests and rock outcrops; locally common in black belt and Jackson prairies; very tolerant of disturbance and can be found in most mesic prairie soil sites, scattered elsewhere in disturbed areas. Dist: VT, ON, MN, and NE south to GA and TX; westward in CO and UT (presumably as introductions).
Origin/Endemic status: Native
Synonymy: = Ar, C, F, FNA21, G, GrPl, Il, K1, K3, K4, NE, NY, Pa, SE1, Tn, Va; = Rudbeckia triloba L. – S; < Rudbeckia triloba L. – Mi, NcTx, Oh3, RAB, W, WV