Phacelia ranunculacea (Nuttall) Constance. Hab: Bottomland forests. Dist: In the Mississippi and Ohio river drainages, centered around St. Louis, MO (w. KY, w. TN, e. MO, ne. AR, se. MO, s. IL, and s. IN). Reported for sc. AL, apparently in error.
Origin/Endemic status: Endemic
Taxonomy Comments: See Sewell & Vincent (2006) for detailed discussion.
Synonymy: = Ar, Il, K1, K3, K4, Tn, Sewell & Vincent (2006); < Phacelia ranunculacea (Nutt.) Constance – C, F, G, Constance (1949)