Rudbeckia grandiflora (Sweet) A.P. de Candolle. Largeflower Coneflower. Phen: Jun-Jul. Hab: Limestone glades and barrens. Dist: MO and KS south to nw. LA and TX; disjunct in nw. GA (historical).
Origin/Endemic status: Native
Synonymy ⓘ: = C, F, Il, S; = Rudbeckia grandiflora (Sweet) DC. var. grandiflora – Ar, FNA21, GrPl, K1, K3, K4, SE1, Perdue (1957); < Rudbeckia grandiflora (Sweet) DC. – Tx
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