648 AMYGDALACEAE 
. P. americana Marsh. Tree becoming 10 m. tall, the young twigs chest- 
nut-brown: leaf-blades oval or elli D : narrowly obovate, 6—10 cm. long, 
glabrous or sparingly pubescent ben 
(densely pubescent in P. ricana dis 
ather narrowed at 
flower o ther e 
umbels als lanceolate or elliptic-lanceo- 
D-PL TH M.)— 
Edges of woods, river- “banks, thickets, and 
fence-rows, various provinces, Fla. to Colo., 
Mont., and N. Y.—Fr. ripe late ae or fall. 
P. mexicana S. Wats. Tree becoming 12 m. tall, the young twigs gray- 
ish: leaf-blades elliptic-obovate or obovate, 7—10.5 cm. long, pubescent, at least 
beneath, rounded to subcordate at the base: flowers 2—4 together in nearly 
nt 
or mon often sparingly pubes n without: drupe globose or very 
Ru pes oid, 18-30 mm. in eie dark a cnius with bloom: stone 
obovoid to near rly round, 12.5-16 mm. long.—(BIG-TREE PLUM.)—Open woods, 
rich bottoms, and upla and prairies, Coastal Plain and adj. provinces, Ala. to 
Tex., Okla., and Ky.—(Mez.)—F'. ripe fall. 
P. umbellata Ell. Tree 8 m. tall or less, the young twigs dark reddish- 
d. 
brown, glabrous: leaf-blades d e elliptic-lanceolate, or oval, 4-7 em. 
long, ris glabrous above, pubescent beneath along the midrib, and also some- 
e —20 mm. in 
diameter, ded ye JS or mc Ris dark- s with bloom: stone oval or 
nearly globose.—(SL Lor. HoG-PLUM. L2 ed ae! woods 
|. and river D Coastal Plain, "Fla. to La. and S. C.—Fr. ripe 
4, P. pied pi Shrub or small tree, 4-8 m. tall, seldom spiny, with 
dark-gray or reddish-brown bark and glabrous shining twigs: leaf-blades 2-9 
em. long, elliptic, elliptic la e or rarely 2 P e or obovate, acute or acumi- 
nate, sharply serrate, narrowed or rounded at the base, finely pu ubescent on 
both surfaces and espec cially along the aa midrib and veins beneath: 
sepals triangular, subacute, pubescent bo ek t and densely so within: petals 
6-8 mm. long: drupe ellipsoid, 10-14 m aa. dark-purple Dan the bloom: 
stone ovoid or oval, slightly compressed, about 1 em. long, pointed at both ends 
and especially at the apex, crested on one per i RE soil, often in open 
woods, Coastal Plain and adj. provinces, Ga. and A 
5. P. injucunda Small Shrub or small tree, seldom spiny, the fark dark- 
gray and on the younger branches covered with a velvety pubescence: leaf- 
a v 
neath, inconspicuously pubescent and slightly rugose abov a y 
ciliate, obtuse: petals 6-8 mm. long; blades oval to orbicular: dnos ellipsoid, 
