This is a widespread, variable northern species (2n = 16, 32). It extends south along the Blue Ridge, and may be expected in the Cumberland Mts. of Ky. There are several old reports from the state, but no convincing colls. have been located (M). Little (1977) mapped it in SHEL and there is a verified coll. from JEFF (GH), but in a possibly horticultural context: D. Blumer-Whultermuth [?] #258, "wild red cherry", 2 Apr 1933, cliff, lakeside, Louisville. The related midwestern plant, P. pumila L. var. depressa (Pursh) Gleason, was listed for Ky. by Short et al. (1833) and others, but no known colls. are traceable to Ky. (M).