. Les arbres de l'Amérique du Nord : être des descriptions et des illustrations de l'arbres croissant indépendamment de la culture en Amérique du Nord, au nord du Mexique et les Antilles . Les arbres. Prunelle 495 apparaissant avant les feuilles en avril ou mai, sont de 1,5 à 2,5 cm. de diamètre, à 3 à 5 fleurs en ombelles sur une surface lisse, rouge les pédicelles j à 2 cm. de long ; le calice-tube est l'ob- conic, généralement rouge, les lobes lancéolés, dentés-glandulaire, pubescentes sur la surface interne ; les pétales sont obovales, arrondies et irrégulièrement erose, blanc, virant au rose. La maturation des fruits, en août ou septembre, est ovale ou subglobuleuses, 2,5 à 3 cm. de long, o

• Contributeur: Central Historic Books / Alamy Banque D'Images
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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. Sloe 495 appearing before the leaves in April or May, are 1.5 to 2.5 cm. across, in 3- to 5-flowered umbels on smooth, red pedicels i to 2 cm. long; the calyx-tube is ob- conic, usually red, the lobes lanceolate, glandular-toothed, hairy on the inner surface; the petals are obovate, rounded and irregularly erose, white, fading to pink. The fruit, ripening in August or September, is oval or subglobose, 2.5 to 3 cm. long, orange to red, with a slight bloom. The skin is thick, the flesh yellow and sour; the stone is oval, flattened, sharply ridged on one edge and sUghtly grooved at the other. The fruit of the Canada plum is collected for culinary purposes, and several improved forms of it are in cultivation. As an ornamental tree it is very desirable on accoimt of its early, large fragrant flowers. The wood is strong, close-grained, hard and brown; its specific gravity is about 0.69. II. SLOE—Pnmns spinosa Linnaeus Also called Blackthorn and Buckthorn, this is a spiny, much branched small tree or shrub, native of Europe, but naturalized along roadsides, from Massachu- setts to Pennsylvania, and New Jersey. Its maximum height is about 9 meters, with a trunk diameter of 6.5 dm. The bark is quite smooth and nearly black; the twigs are smooth, shining, dark brown, becoming dark gray. The leaves are firm, ovate or oblong, 4 to 5 cm. long, blunt at the apex, narrowed or rounded at the base, toothed on the margin, dark green and almost smooth when fully grown; the leaf-stalk is about I cm. long. The flowers appear in April and May before the leaves; they are 10 to 12 mm. across, soUtary or two together, on slender, smooth pedicels about i cm. long; the calyx-tube' is bell-shaped, its lobes narrow, long and blunt. The fruit, ripening in July, is ovoid to globose, about 12 mm. in diameter, nearly black,

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