This diploid (2n = 20) occurs mostly on the southeastern Coastal Plain, but it extends north locally on the Cumberland Plateau, Interior Low Plateaus and Ozark-Quachita region (K). In Ky. it is known only from one patch along banks of the Cumberland Rv. in WHIT, plus an unverified report by Pr from WARR. In addition, [Records in SERNEC from LEWI and ROWA appear to have been erroneous.] Woods & Fuller (1988) reported the related species, E. lancifolium (T. & G.) Small (= E. semiserrartum var. lancifolium), based on R. Athey #2910 (MUR) from CALL, but the coll. has not been relocated; lancifolium is known mostly from s. Ark., n. La. and e. Tex. Reports indicating another allied species, E. glaucescens Ell. (= cuneifolium Willd., misapplied), appear to have been erroneous (M).