Fruit globose or sub-globose, varying from red to yellow, usually with a light bloom; stone about one-half inch long, two-fifths inch broad, turgid, ovoid to elliptic-oblong, obscurely pointed at the apex or sometimes slightly obtuse, truncate or obliquely truncate at the base, grooved on the dorsal edge, ventral edge with a narrow, thickened and slightly grooved wing, the surfaces irregularly roughened. Yellow Transparent may be considered a typical variety. Type specimens in the Economic Collection of the Department of Agriculture were collected at the Eastern Shore Nurseries of J. W. Kerr, Denton, Maryland, (flowers) I. Tidestrom, April, 1910; (foliage and fruit) P. L. Ricker No. 2933, June 29, 1909. In the wild, _Prunus angustifolia varians_ forms dense thickets, the larger specimens attaining a height of ten or twelve feet. When budded and grown in the orchard it assumes the form of a small tree with well defined trunk and spreading branches, sometimes armed with rather slender spinescent branchlets. It is distinguished from the species by its usually more robust habit, by its having the young twigs less reddish and approaching a chestnut-brown in color, rather longer leaves, longer pediceled flowers, and by the stone in most cases being more pointed at the apex. Usually in more fertile soil than the species, it occurs locally from southern Oklahoma through eastern Texas southward possibly to the Colorado River, and probably westward to the Panhandle region. As yet, however, its distribution is not well defined. Nearly all of the early ripening horticultural varieties previously referred to _Prunus angustifolia_ belong to _Prunus angustifolia varians_. The fruit of the sub-species appears to be superior to that of the species though scarcely equal to that of the other southern plums now cultivated. Hybrids between this form and _Prunus munsoniana_ undoubtedly occur freely both in the wild state and under cultivation. The varieties Eagle and El Paso have probably originated in this way. Nearly all of the plums belonging to this species, some twenty in all, are tender to cold, none, so far as is known, succeeding in the North. African, Cluck, Jennie Lucas and Yellow Transparent may be named as representative varieties. =19.= =PRUNUS MUNSONIANA=[139] Wight and Hedrick [Illustration: _PRUNUS MUNSONIANA_] _Prunus angustifolia._ =1.= Bailey _Cornell Sta. Bul._ =38=:58. 1892 (in part). =2.= Ibid. _Ev. Nat. Fr._ 191-194. 1898 (in part). =3.= Waugh _Vt. Sta. An. Rpt._ =10=:99, 105. 1897 (in part). _Prunus hortulana._ =4.= Bailey _Cornell Sta. Bul._ =38=:48. 1892 (in part). =5.= Waugh _Vt. Sta. An. Rpt._ =10=:99, 103-105. 1896-97 (in part).