. 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. Woolly Thorn 471 or crimson; the calyx-lobes are erect, hairy; the flesh yellow, mealy, acid, con- taining 4 or 5, commonly 5, nutlets 7 to 9 mm. long, the nest 8 to 10 mm. thick, the backs of nutlets grooved, and with a deep sinus between them. This runs into many forms. Cratcegus suhmollis Sargent is a form with 10 sta- mens and generally early ripening fruit, occurring in eastern Canada and New England. Cratagus champl
. 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. Woolly Thorn 471 or crimson; the calyx-lobes are erect, hairy; the flesh yellow, mealy, acid, con- taining 4 or 5, commonly 5, nutlets 7 to 9 mm. long, the nest 8 to 10 mm. thick, the backs of nutlets grooved, and with a deep sinus between them. This runs into many forms. Cratcegus suhmollis Sargent is a form with 10 sta- mens and generally early ripening fruit, occurring in eastern Canada and New England. Cratagus champlainensis Sargent is- a later fruiting form with 10 sta- mens, with about the same range. 35. CANADIAN THORN — OratSBgus canadensis Sargent Cratagus canadensis is known to occur only on the limestone ridges along the St. Lawrence river above Montreal at Caughnawaga. It is a tree sometimes 9 meters high, with spreading branches, forming a large rounded topped crown; twigs orange-brown, hairy when young, becoming smooth, armed with numer- ous curved, chestnut-brown spines from 3 to 7 cm. long. The leaves are broadly ovate to oval, 3 to 8 cm. long, 3 to 8 cm. wide, pointed at the apex, rounded or cut square at the base, doubly toothed, with sharp, erect teeth, slightly hairy on the upper surface, becoming nearly ^i^- 425- —Canadian Thorn, smooth, woolly-hairy, particularly along the veins, beneath, thin, blue-green; leaf- stalks woolly-hairy, becoming nearly smooth, glandular, winged, 2 to 3 cm. long. The flowers are about 15 mm. wide in many-flowered woolly-hairy corymbs; calyx-tube and lanceolate long-pointed, glandular-toothed lobes woolly-hairy; sta- mens about 20; anthers small, yellow; styles 5. The fruit, which ripens in October, is short-oblong to globose, about 15 mm. thick, scarlet, slightly hairy, its calyx- lobes spredlding, prominent; flesh pale yellow, dry, mealy and acid; it contains 5 nutlets, 6 to 8 mm. long, grooved on the back, the nest about 8 to 9 mm. thick
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