572 AMYGDALACEAE 
usually 1.5-2 em. long or longer at maturity : sepals pubescent within : drupes globose or 
nearly so, 12-15 mm. in diameter, nearly black beneath the bloom when mature, with an 
acid flesh : stone plump, acute at both ends. 
About river swamps and hammocks, South Carolina to Florida, Louisiana and Arkansas. Hoc 
PLUM. BLACK SLOE. BULLACE PLUM. 
8. Prunus mitis Beadle. A 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 cm. long, ellip- 
tic, oblong-lanceolate or rarely ovate or obovate, acute or acuminate, sharply serrate, nar- 
rowed or rounded at the base, finely pubescent on both surfaces and especially along the 
prominent midrib and veins beneath, biglandular at the base, or on the short pubescent 
petioles: hypanthium glabrous, at least the lower portion: sepals triangular, subacute, 
pubescent outside, densely so on the inner surface: drupe oblong, 10-14 mm. long, dark 
purple with a glaucous bloom : stone ovoid or oval, slightly compressed, about 1 cm. long, 
pointed at both ends and especially at the apex, crested on one margin. 
In dry soil, Georgia and Alabama. 
9. Prunus tarda Sarg. A tree often becoming 8 m. tall and 6 dm. in diameter at the 
base, with wide-spreading branches, the slender branchlets lustrous. Leaf-blades firm, 
oblong to obovate, 3.5-7.5 cm. long, acute or acuminate at the apex, finely serrate with 
minutely glandular teeth, becoming glabrous above, more or less pubescent beneath along 
the yellow midrib and its branches, gradually narrowed and rounded or cuneate at the 
base ; petioles densely pubescent: flowers 2 or 3 together: pedicels glabrous, 2 cm. long 
or shorter: sepals acute, entire, pubescent on both surfaces: corolla 10-14 mm. broad : 
drupe broadly oblong to subglobose, 8-12 mm. long, yellow, purple, red, blue or black, 
send aa acid: stone slightly flattened, acute and apiculate at the apex, rounded at the 
ase. 
In open woods and thickets, Arkansas to Louisiana and Texas. 
10. Prunus normàlis (T. & G.) Small. A shrub 3-13 dm. tall, with spreading un- 
armed branches and densely pubescent young foliage. Leaf-blades thick, oblong to elliptic, 
2-3 cm. long, obtuse or merely acute at each end, sharply serrate with appressed teeth, 
sparingly pubescent above, densely tomentose and prominently nerved beneath, short- 
petioled : flowers in lateral clusters preceding the leaves : pedicels slender, 9-15 cm. long : 
sepals ovate or ovate-lanceolate, finely pubescent, obtuse: corolla 6-8 mm. broad: drupes 
globose-oval, 8-10 mm. long: stone suborbicular, slightly flattened. 
In dry or sandy soil, Kansas to Tennessee and Texas, Sow PLUM. 
11. Prunus injucünda Small. A shrub or tree of a somewhat straggling habit, 5-8 m. 
high, with a maximum trunk diameter of 2 dm., seldom spiny, clothed with a dull dark- 
gray bark which on the younger branches is covered with fine pubescence of a velvety tex- 
ture. Leaf-blades 2-6 em. long, 1-3 em. broad, oval or obovate, acute or somewhat acu- 
minate, finely but sharply serrate with apiculate teeth, acute or acuminate at the base, 
conspicuously and densely pubescent beneath, inconspicuously pubescent ‘and slightly rugose 
above, the midrib very prominent, its lateral branches less so ; petioles 0.5-1 cm. long, 
pubescent : drupe oblong, 12-15 mm. iong, dark purple, clothed with a lighter bloom : stone 
ovoid, 8-10 mm. long, much compressed, pointed at both ends, crested, and grooved on each 
side of the crest, also grooved on the opposite side. 
In sandy soilin the granite districts, Georgia and Alabama. Hoc PLUM. 
12. Prunus rivularis Scheele. A shrub 1-2 m. tall, with shining, glabrous, some- 
what, angled branchlets. Leaf-blades oblong or oblong-ovate, long-acuminate, serrate, 
glabrous above, sparingly pubescent beneath, short-petioled : clusters with usually 2 or 5 
flowers, or flowers sometimes solitary : pedicels 9-13 mm. long : sepals lanceolate, sparing!y 
pubescent: corolla mostly 12-13 mm. ond drupes subglobose, 15-20 mm. long, bright- 
red, shining. 
In river valleys, Texas. 
13. Prunus Watsdnii Sarg. A sparingly spiny shrub 2-3.5 m. tall, with glabrous 
‘foliage. Leaf-blades thickish, aloes or oblong-lanceolate, 2-5 cm. long, acute at the apex, 
crenulate-serrate, acute or rounded at the base, lustrous above, pale and dull beneath ; pn 
oles slender, wiry, 1-1.5 cm. long : clusters few-flowered : pedicels 8-12 mm. long, red : sepais 
ciliate, but without glands: corolla 10-12 mm. broad, pure white : drupes subglobose or 
somewhat elongated, 20-22 mm. long, orange-red, without bloom, the flesh yellow : stone 
oval, slightly pitted, abruptly flattened near the apex. 
In sandy soil, Nebraska to Arkansas. SAND PLUM. A 
14. Prunus angustifdlia Marsh. A sparingly spiny shrub or small tree, sometime’ 
8 m. tall, with a slender trunk, often forming thickets. Leaf-blades rather thin, oblong be 
oblong-lanceolate, 3-10 cm. long, acute or slightly acuminate at the apex, serrulate, acute or 
rounded at the base, short-petioled : flowers in lateral clusters, appearing before the leaves : 
