Boltonia diffusa Elliott var. interior Fernald & Griscom. Phen: Jul-Sep. Hab: Moist or dry open ground. Dist: KY and TN west to IL, OK, and LA.
Origin/Endemic status: Endemic
Synonymy: = Ar, F, FNA20, Il, K1, Tn; < Boltonia diffusa Elliott – C, G, K3, K4, Ok, SE1, Anderson (1987); < Boltonia sp. – GW2