. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Wild Yellow Plum 491 petals are orbicular; the filaments and base of the pistil are haiiy. The fruit, ripening in July or August, is oblong, to cm. long, dark purple with a lighter bloom; the flesh is thin, sour, and astringent; the stone is ovoid, 8 to 10 mm. long, much flattened, somewhat wrinkled, pointed at both ends, with a broad grooved ridge on one edge and a groove at the other. The fruit of the Hog plum,
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Wild Yellow Plum 491 petals are orbicular; the filaments and base of the pistil are haiiy. The fruit, ripening in July or August, is oblong, to cm. long, dark purple with a lighter bloom; the flesh is thin, sour, and astringent; the stone is ovoid, 8 to 10 mm. long, much flattened, somewhat wrinkled, pointed at both ends, with a broad grooved ridge on one edge and a groove at the other. The fruit of the Hog plum, as its common name implies, is not considered fit for domestic use. This species has been regarded as a variety of the Black sloe and described under the name Prunus umbellata injucunda Sargent. 6. WILD YELLOW PLUM —Pnmus americana MarshaU Also called Wild red plum, this low-branched, somewhat spiny tree of woods and thickets from New York to Ohio, Montana, Florida, Texas and Colorado, attains a maximum height of 11 meters, with a trunk diameter of 3 dm. The numerous branches are wide-spreading, often drooping, and frequently armed with many spine-like spurs; the bark is about 15 mm. thick, breaking up into thin, dark brown plates; the twigs are smooth or hairy, Ught green, becoming brown and finally reddish brown; the winter buds are very small, sharp-pointed and brown. The leaves are firm, elliptic to oval or obovate, 4 to 10 cm. long, taper-pointed, usually rounded at the base, sharply toothed, sometimes doubly so, dark green and rough with midrib impressed above, paler and hairy, especially near the veins, be- neath; the slender leaf-stalk is to 2 cm. long. The flowers appear in March at the South to May at the North; they are white, cm. across, in sessile 2- to 5-flowered um- bels, on slender, smooth pedicels i to 2 cm. long; the calyx-tube is obconic, smooth, usually red on the outside, the lobes entire and sharp-pointed; the petals are obovate, rounded, and irr
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