Vou. II.] PLUM FAMILY. 247 
1. Prunus Americana Marsh. Wild 
Yellow or Red Plum. (Fig. 2007.) 
Prunus Americana Marsh. Arb. Am. 111. - 1785. 
A shrub or small tree, maximum height about 
35°, and trunk diameter about 12’; branches more 
or less thorny; bark thick. Leaves ovate or ob- 
ovate, acuminate, nearly or quite glabrous when 
mature, usually pubescent when young, sharply 
and often doubly serrate, rounded at the base, 
slender-petioled; petioles usually glandless; flow- 
ers white, 8’’-12’’ broad, appearing in lateral ses- 
sile umbels before the leaves; pedicels 5’’-9’’ long; 
calyx-lobes pubescent within, entire; drupe glo- 
bose, red or yellow, 9//-12’’ in greatest diameter, 
the skin tough, bloom little or none, the stone 
somewhat flattened, its ventral edge acute or mar- 
gined, the dorsal faintly grooved. 
New York to Montana, Florida and Colorado. A 
southwestern form has very pubescent leaves. April- 
May. Fruit ripe Aug.—Oct. 
\ t—<— , 2. Prunus nigra Ait. Canada Plum. 
\ le; \\ y 44 . 
: hey Horse Plum. (Fig. 2008.) 
A \ y ——; / 3 Prunus nigra Ait. Hort. Kew. 2: 165. 1789. 
SO SES) / Prunus mollis Torr. Fl, U. S. 1: 470. 1824. 
Rae } fi A A tree, 20°-30° high, the trunk sometimes 10/ 
in diameter, the bark thin. Leaves oval, ovate or 
j obovate, long-acuminate, pubescent when young, 
£ s ) crenulate-serrate, narrowed, obtuse or subcordate 
$ é at the base, 3/—5’ long; petioles stout, %/-1/ long, 
: Sea ts bearing 1 or 2 red glands near the blade; flowers in 
£ f/f ®& > lateral umbels, expanding before the leaves, 1/— 
/ / 114’ broad; pedicels 6//-10’’ long, slender, gla- 
J i, brous; calyx-lobes glandular-serrate, glabrous 
within, sometimes pubescent without; drupe oval, 
1’-1!4’ long, orange-red, thick-skinned, bloom lit- 
= tle or none, the flesh adherent to the oval com- 
| ican pressed stone, which is sharply ridged on the ven- 
Ip : ay REO tral edge, somewhat grooved on the dorsal. 
ly 3 Oo: Newfoundland to Manitoba, Massachusetts and 
Cs 4 Craig) Wisconsin. Wood hard, reddish-brown; weight per 
cubic foot 43 lbs. May. Fruit Aug. 
3. Prunus hortulana Bailey. Wild Goose Plum. (Fig. 2009.) 
P. hortulana Bailey, Gard. & For. 5:90. 1892. 
A small tree, similar to the two preceding; 
branches spreading, bark thin. Leaves 
ovate-lanceolate to ovate, long-acuminate, 
somewhat peach-like, closely glandular-ser- 
rate, 4’-6’ long; petioles not 1’ long, usually 
bearing two glands near the blade; flowers in 
lateral umbels, expanding before the leaves; 
pedicels 5//-10’’ long; calyx-lobes glandu- 
lar-serrate, pubescent without and within; 
drupe subglobose or short-oval, bright red, 
thin-skinned, stone swollen, roughish, not 
margined; bloom little or none. 
Illinois to Tennessee, Arkansas and Texas. 
Perhaps a hybrid. April-May. 
Prunus hortulana Mineri Bailey, Bull. Cornell 
Agric. Exp. Sta. 38: 23. 1892. 
Leaves dull, thick, irregularly coarsely serru- 
late, conspicuously veiny beneath; stone nearly 
smooth; leaves varying to oblanceolate. Illinois 
to Tennessee and Missouri. 
