. 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. Fig. 452. — Wild Goose Plum. 4-flowered umbels on slender, roughish pedicels; the calyx-tube is obconic, the lobes ovate, blunt or pointed, glandular- toothed, hairy on both surfaces; the petals are obovate, seldom notched. The fruit ripens in September or October, is nearly globular, 2 to cm. long, bright red; its skin is thick, the flesh thin, hard, and acid; the stone is oval, somewhat swollen, usually rough and pi
. 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. Fig. 452. — Wild Goose Plum. 4-flowered umbels on slender, roughish pedicels; the calyx-tube is obconic, the lobes ovate, blunt or pointed, glandular- toothed, hairy on both surfaces; the petals are obovate, seldom notched. The fruit ripens in September or October, is nearly globular, 2 to cm. long, bright red; its skin is thick, the flesh thin, hard, and acid; the stone is oval, somewhat swollen, usually rough and pitted, grooved on one edge, ridged on the other. The fruit of the Wild goose plum is gathered from the wild trees and used like that from other wild plums. It is the parent of many of the best varieties of American cultivated plums. The wood is similar to that of the closely related plum trees. A form with dull, thicker, coarser toothed, mostly oblanceolate, prominently-veined leaves and a smooth stone, oc- curring in Illinois, Missouri, and Tennessee, is known as Prunus hortulana-Mineri Bailey, and sometimes regarded as a distinct species. 10. CANADA PLUM —Pmnns nigra Aiton Also called Horse plum, this is a small, bushy tree, occurring in woods and ne- glected lands from Newfoundland to Alberta, and southward to Georgia, reaching a maxi- mum height of 10 meters, with a trunk di- ameter of 3 dm. The bark is 3 mm. thick, with a smooth light gray to brown, thin outer layer, which peels qff readily; the twigs are Ught green, smooth or slightly hairy, soon becoming dark red-brown, and develop spine-Uke spurs often 5 cm. long; the winter buds are rather large, 5 to 8 mm. long, and covered with brown scales. The leaves are firm, elliptic to obo- vate, 6 to 12 cm. long, to 7 cm. broad, sharply pointed, rounded or blunt at the broadish base, margined by glandular, mostly double teeth, light green and smooth above, pale and sparingly hairy, with midrib promi- nent beneath; the le
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