. 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. 492 The Plums and Cherries The Woolly-leaf plum is a variety of this, or perhaps a distinct species, with conspicuously hairy leaves and twigs, occurring west of the Alleghany Mountains, principally in the Gulf States, and known as Prunus americana lanata Sudworth. 7. PACIFIC PLUM—Prunus subcordata Bentham A low branching tree, or usually a shrub, on dry rocky hills of southern Oregon to middle California, reaching a maxi

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. 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. 492 The Plums and Cherries The Woolly-leaf plum is a variety of this, or perhaps a distinct species, with conspicuously hairy leaves and twigs, occurring west of the Alleghany Mountains, principally in the Gulf States, and known as Prunus americana lanata Sudworth. 7. PACIFIC PLUM—Prunus subcordata Bentham A low branching tree, or usually a shrub, on dry rocky hills of southern Oregon to middle California, reaching a maximum height of 7.5 meters, with a trunk diameter of 3 dm. The branches are stout, somewhat spread- ing; the bark is about 8 mm. thick, gray to brown and fissured into thin, scaly plates; the twigs are sometimes hairy, soon becoming smooth and bright red, finally dark reddish purple to brown-gray. The leaves are some- what leathery, ovate to orbicular, 2.5 to 7 cm. long, rounded or blunt at the apex, slightly heart-shaped or roimded at the base, closely, sometimes doubly toothed, dark green above, paler beneath, the venation prominent beneath and impressed above; the leaf-stalks are i to 5 cm. long. The flowers, appearing from March to May, are about 2 cm. across, in nearly stalkless, 2- to 4-flowered umbels, on slender pedicels 7 to 15 mm. long; the calyx-tube is bell-shaped, nearly smooth, the lobes oblong, roimded and somewhat hairy; the petals are obovate, rounded; the pistil and filaments are smooth. The fruit ripens in August or September, is globose or oblong, 2 to 3 cm. long, dark red or sometimes yellow; the flesh is juicy and pleasantly acidulous; the stone is somevdiat flattened, 1.5 to 2.5 cm. long, pointed at each end, sharply ridged on one edge and grooved on the other. Its fruit is much gathered from wild growing trees and from selected forms broughf under cultivation. The young plants are used by western nurserymen as stock upon which to graft or bud better vari

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