The curl-leaf mountain-mahogany of the Intermountain Region is given a varietal name for the first time,Cercocarpus ledifolius var.intermontanus. It is distinguished from var.ledifolius by its broader, less pubescent leaves, its often longer petioles, and its often longer hypanthium tube. The nameC. ledifolius var.intercedens C. Schneider is based on a likely hybrid betweenC. ledifolius var.intermontanus andC. intricatus. The namesC. hypoleucus andC. ledifolius var.intercedens f.hirsutus fall into synonymy underC. ledifolius var.ledifolius. A lectotype is selected for the quadrinomialC. ledifolius var.intercedens f.hirsutus.