248 DRUPACEAE. [Vou. Il. 
4. Prunus angustifolia Michx. Chicka- 
saw Plum. Hog Plum. (Fig. 2010.) 
Prunus angustifolia Marsh. Arb. Am. 111. 1785. 
Prunus Chicasa Michx. F1. Bor, Am, 1: 284. 1803. 
A small tree, sometimes 25° high, the trunk 7’ 
in diameter, the branches somewhat thorny. 
Leaves lanceolate or oblong-lanceolate, acute at 
the apex, serrulate, often rounded at the base, gla- 
brous when mature, 3/-5’ long; flowers smaller 
than those of the preceding species, in lateral 
umbels, expanding before the leaves; drupe red, 
globose, 6’’-9’’ in diameter, nearly destitute of 
bloom, thin-skinned, its stone ovoid, hardly flat- 
tened, both edges rounded, one of them slightly 
grooved, 
In dry soil, southern New Jersey to Florida, west 
to the Rocky Mountains. Supposed to be native in 
the Southwest. Wood soft, reddish-brown; weight 
per cubic foot 43 lbs. April. Fruit ripe May-July. 
5. Prunus Watsoni Sargent. Watson’s 
Plum. Sand Plum. (Fig. 2orr.) 
Prunus Watsoni Sargent, Gard, & For. 7: 134. /.! 
25. 1804. 
A shrub, 6°-10° high, somewhat spiny. 
Leaves ovate to ovate-lanceolate, firm, acute or 
acuminate at the apex, rounded or narrowed at 
the base, finely crenulate-serrulate all around, 
1/-2’ long, 6’’-10’’ wide, shining above, the 
petioles about 14’ long; flowers 5//-6’’ broad, 
in numerous sessile lateral fascicles; pedicels 
4/’-6’’ long, red, glabrous; petals oblong-ob- 
ovate, short-clawed; fruit globose or some- 
what elongated, about 9’” in diameter, orange- 
ted, without a bloom, the flesh yellow; skin 
thick; stone oval, pitted, mostly rounded on both 
margins, abruptly flattened at the summit. 
Sandy soil, Nebraska to Arkansas, April-May. 
6. Prunus Alleghaniénsis Porter. 
Porter’s Plum. (Fig. 2012.) 
drenes Alleghaniensis Porter, Bot. Gaz. 2: 85. 
1877. 
A low, straggling shrub or small tree, with 
maximum height of about 15° and trunk dia- 
meter of 5’, seldom thorny. Leaves ovate-ob- 
long or obovate, acute or acuminate, finely and 
sharply serrate, rounded at the base, pubescent 
when young, glabrous or very nearly so when 
old; flowers similar to those of P. Americana, 
about 7’ broad; drupe globose-ovoid, about 5/’ 
in greatest diameter, very dark purple with a 
conspicuous bloom; pulp pleasantly acid; stone 
slightly flattened, a shallow groove on one 
margin, a slight expansion on the other. 
Barrens of Huntingdon Co., across the Alleghany 
Mountains to Clearfield Co., Pa. April. Fruit ripe 
in August. . 
