The range of _Prunus alleghaniensis_ is exceedingly limited. It is found in abundance only in a small territory in central Pennsylvania, being of most frequent occurrence in the barrens of northern Huntingdon County, extending from there north into Center County and northwestward over the Alleghany Mountains into Clearfield and Elk counties. It grows for the most part in elevated lands of the wildest character, being found on low, moist soils, on high and dry barrens and on limestone cliffs, reaching its greatest size in the last situation. Specimens identified as _Prunus alleghaniensis_ have been found in at least two places in Connecticut and the writer has just seen specimens of a closely allied form collected by W. F. Wight of the United States Department of Agriculture a few miles south of Houghton Lake, Roscommon County, Michigan. This plum is not yet introduced into cultivation and it is doubtful if the wild fruits have sufficient merit to make an attempt at domestication promising. While the wild fruits are locally used for various culinary purposes it is so much inferior to other native plums, being almost uneatable unless cooked, that its cultivation would hardly warrant the effort. Arboretum specimens of the tree show it to be somewhat desirable as an ornamental, being a small, compact, upright plant, very floriferous, and bearing an abundance of rather attractive fruit. =14.= =PRUNUS SUBCORDATA= Bentham =1.= Bentham _Pl. Hartweg._ 308. 1848. =2.= Torrey _Pac. R. Rpt._ =4=:82. 1854. =3.= Brewer and Watson _Bot. Calif._ =1=:167. 1880 (in part). =4.= Lemmon _Pittonia_ =2=:68. 1890. =5.= Greene _Fl. Francis_ =1=:49. 1891. =6.= Bailey _Cornell Sta. Bul._ =38=:76. 1892. =7.= Sargent _Sil. N. Am._ =4=:31, 32, Pl. 154. 1892. Tree small, rarely attaining a height of twenty-five feet, sometimes a shrub ten or twelve feet high and often a bush but three or four feet in height; trunk medium in length with a diameter of 8 to 12 inches; bark gray-brown and deeply fissured; branches stout and spreading; branchlets glabrous or pubescent, bright red becoming darker red and finally a dark-brown or gray; lenticels minute, whitish. Leaves round-ovate, sub-cordate or truncate, or sometimes cuneate at the base; margins either sharply or obtusely serrate, sometimes doubly serrate; young leaves pubescent but at maturity nearly glabrous, somewhat coriaceous, dark green on the upper and pale green on the lower surface, with very conspicuous midribs and veins; stipules acute-lanceolate, caducous.