Taxonomic status: Synonym

homotypic synonyms:
Rudbeckia purpurea var. serotina Nutt.;

protologue: Brit. Fl. Gard. 1: t. 4 (1823) [url checked 20200628]

URL protologue: https://archive.org/stream/britishflowergar01swee#page/n24/mode/2up

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