Rudbeckia maxima Nuttall. Phen: May-Jun. Hab: Pinelands, prairies, low areas in silty or sandy soils, also (eastwards) in disturbed areas (persistent from horticultural use). Dist: AR and se. OK south to LA and e. TX.
Origin/Endemic status: Native
Synonymy: = Ar, C, F, FNA21, K1, K3, K4, NcTx, S, SE1, Tx; = n/a – RAB