Ratibida columnifera (Nutt.) Wooton & Standl. [ Rudbeckia columnaris Pursh]
Ratibida columnifera (Nutt.) Wooton & Standl. [ Rudbeckia columnifera Nutt.] [Compositae]
G.L. Goodale, Wild Fl. Amer. (Goodale): t. 8 (1886) [I. Sprague]