This is a widespread northern diploid (2n = 14) extends south in eastern states to n. Ohio, n. Ind. and s. Ill. (K). There is an old fruiting coll. from DAVI (KY-Agr.): J.C. McClure, 7 Jun 1932, Owensboro. This coll. clearly has the distinctive semi-cordate stipules of ochroleuca (versus semi-sagittate in venosus and palustris).