Euphorbia ouachitana M.H. Mayfield. Phen: Apr-May. Hab: Dry to dry-mesic woodlands and forests over shale, sandstone, novaulite, or limestone; bluffs and cliffs on sandstone or shale. Dist: Endemic to the Interior Highlands (s. MO to ne. TX), except also disjunct to river bluffs in the Nashville Basin (TN).
Origin/Endemic status: Endemic
Synonymy: = FNA12, K4, Mayfield (2013); = n/a – C