Phacelia strictiflora (Engelmann & A. Gray) A. Gray var. robbinsii Constance. Phen: Mar-May. Hab: Dry sandy open areas and woodlands. Dist: W. AR and OK south to w. LA and ne. TX; disjunct eastwards in the Black Belt of e. MS and AL.
Origin/Endemic status: Endemic
Synonymy: = Ar, K1, K3, K4, NcTx, Constance (1949); < Phacelia strictiflora (Engelm. & A.Gray) A.Gray – GrPl