Helianthus maximilianii Schrader. Phen: Aug-Oct. Hab: Moist roadsides and disturbed areas. Dist: MI and MB west to BC and south to TX and Mexico (CHH, COA, NLE); introduced in the East.
Origin/Endemic status: Native
Synonymy: = C, GrPl, Il, Mex, Oh3, SE1, Tn, W; = Helianthus maximiliani – Ar, FNA21, G, K1, K3, K4, Mi, NcTx, NE, NY, Pa, RAB, S, Tx, Va, orthographic variant; > Helianthus dalyi Britton – F; > Helianthus maximiliani – F, orthographic variant