. 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. 468 The Thorn Trees usually with several pairs of spreading broad-pointed or pointed lobes, green, thin but firm, sHghtly hairy on the veins beneath; leaf-stalks glandular, slightly hairy, 2 to 3 cm. long. The flowers are about 20 mm. wide in few-flowered, smooth corymbs, the calyx-lobes ovate, pointed, remotely glandular-toothed; stamens about 20; anthers pink; styles 3 to 5. The fruit ripens late; it is sub- globose, s-
. 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. 468 The Thorn Trees usually with several pairs of spreading broad-pointed or pointed lobes, green, thin but firm, sHghtly hairy on the veins beneath; leaf-stalks glandular, slightly hairy, 2 to 3 cm. long. The flowers are about 20 mm. wide in few-flowered, smooth corymbs, the calyx-lobes ovate, pointed, remotely glandular-toothed; stamens about 20; anthers pink; styles 3 to 5. The fruit ripens late; it is sub- globose, s-angled, about 20 mm. thick, dark crimson; the calyx-lobes are erect, conspicuous; flesh firm, tinged with red, subacid; it contains 3 to 5 nutlets, usually 5, 7 to 9 mm. long, grooved on the back, the nest of nutlets 9 to 11 mm. thick with a deep sinus between the Fig. 420. — Eggert's Thom. Cratmgus dilatata Sargent is an eastern form, with bright red fruit and larger corymbs. 31. PRINGLE'S THORN - Crataegus Pringlei Sargent Pringle's thorn grows from western New England southward to Pennsylvania and westward to southern Ontario, Michigan, and northern Illinois. It is a tree sometimes 8 meters high, with ascending branches forming a broad roimd-topped crown; the bark is thin, scaly and red-brown; the twigs are chestnut-brown, hairy, becoming gray and smooth, the curved chestnut-brown spines from 3 to 5 cm. long. The leaves are ovate-oval, 3 to 9 cm. long, to 8 cm. wide, broadly pointed at the apex, rounded or abruptly wedge- shaped at the base, doubly toothed, the terminal leaves often with several pairs of bro^-pointed or pointed lobes, bronze- green and hairy when young, becoming bright yellow-green and smooth above, paler beneath, hairy along the veins, be- coming nearly smooth, thin; leaf-stalks hairy, glandular, i to 3 cm. long. The flowers are about 2 cm. wide, in many- flowered, hairy (sometimes nearly smooth) corymbs; calyx-tube slightly hairy, the lan-
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