A Synopsis of the Genus Proserpinaca in the Southeastern United States

Based on the examination of 1,400 specimens, descriptions and distributions are provided for the five taxa of Proserpinaca in the southeastern United States. Proserpinaca palustris var. palustris, P. intermedia and P. pectinata occur primarily in the Atlantic and Gulf Coastal plains, while P. palustris var. amblyogona occurs in the Mississippi embayment area and P. palustris var. crebra occurs throughout the Southeast.