2. =Prùnus Americàna=, Marsh. (WILD YELLOW OR RED PLUM.) Leaves ovate or somewhat obovate, conspicuously pointed, coarsely or doubly serrate, very veiny, smooth when mature. Fruit with little or no bloom, ½ to 1 in. in diameter, yellow, orange, or red; skin tough and bitter. Stone with two sharp edges. A small, thorny tree, 8 to 20 ft. high, common in woodlands and on river-banks. Many improved varieties, some thornless, are in cultivation. Wood reddish color. [Illustration: P. Alleghaniénsis.] 3. =Prùnus Alleghaniénsis=, Porter. (ALLEGHANY PLUM.) Leaves lanceolate to oblong-ovate, often long-acuminate, finely and sharply serrate, softly pubescent when young, smooth when old; fruit globose-ovoid, under ½ in., very dark purple, with a bloom; stone turgid, a shallow groove on one side and a broad, flat ridge on the other. A low, straggling bush, occasionally a tree, 3 to 15 ft. high. Mountains of Pennsylvania. [Illustration: P. Chicàsa.] 4. =Prùnus Chicàsa=, Michx. (CHICASAW PLUM.) Leaves long, narrow, almost lanceolate, acute, finely serrate, thin. Flowers on short stalks. Fruit globular, ½ to 2/3 in. in diameter, thin-skinned, without bloom, yellowish-red, pleasant to taste. Stone globular, without sharp edges. A thorny shrub or small tree, 6 to 15 ft. high; wild in New Jersey, west and south, and often cultivated. [Illustration: P. spinòsa.] 5. =Prùnus spinòsa=, L. (SLOE. BLACKTHORN. BULLACE PLUM.) Leaves obovate-oblong to lance-oblong, sharply serrate, soon smooth; leafstalk smooth; fruit small, globular, black, with a bloom; the stone rounded, acute at one edge; flesh greenish, astringent. A low tree with thorny branches; it is becoming naturalized along roadsides and waste places; from Europe. Var. _instititia_ (Bullace Plum) is less thorny, and has the leafstalk and lower side of the leaves pubescent. [Illustration: P. doméstica.] 6. =Prùnus doméstica=, L. (COMMON GARDEN PLUM.) Leaves 1 to 3 in. long, oval or ovate-lanceolate, acute to obtuse. Flowers white, nearly solitary. Drupe globular, obovoid to ovoid, of many colors (black, white, etc.), covered with a rich glaucous bloom. A small tree, 10 to 20 ft. high, in cultivation everywhere for its fruit. Over a hundred varieties are named in the catalogues. [Illustration: P. Pennsylvánica.] 7. =Prùnus Pennsylvánica=, L. f. (WILD RED CHERRY.) Leaves oblong-lanceolate, pointed, finely and sharply serrate, shining green, smooth on both sides. Flowers many in an umbel on long stems. Fruit round, light red, quite small, ¼ in. in diameter, sour. A small tree, 20 to 30 ft. high, in rocky woods; common north and extending southward along the Alleghanies to North Carolina. [Illustration: P. àvium.]