. 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. 464 The Thorn Trees brown; the twigs are orange-green, hairy, or sometimes smooth at first, and are armed with curved chestnut-brown spines 2 to 4 cm. long. The leaves are oblong-obovate, some- times ovate, 2 to 6 cm. long, 2 to 4 cm. wide, doubly toothed, with broad teeth and broad pointed lobes, bluntly pointed or rounded at the apex, wedge- shaped at the base, slightly hairy when young, becoming smooth, dark green abov
. 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. 464 The Thorn Trees brown; the twigs are orange-green, hairy, or sometimes smooth at first, and are armed with curved chestnut-brown spines 2 to 4 cm. long. The leaves are oblong-obovate, some- times ovate, 2 to 6 cm. long, 2 to 4 cm. wide, doubly toothed, with broad teeth and broad pointed lobes, bluntly pointed or rounded at the apex, wedge- shaped at the base, slightly hairy when young, becoming smooth, dark green above, paler beneath, half-leathery; leaf- stalks slightly winged above, glandular, 1 to 3 cm. long. The flowers are about 2 cm. wide, in few-flowered, nearly smooth corymbs; calyx-lobes linear, long-pointed, short-hairy, glandular- toothed; stamens about 20; anthers yel- low; styles 2 or 3. The fruit ripens late in September; it is short-oblong or sub- globose, dull dark red or orange-red; calyx-lobes spreading or erect; flesh yellow, dry, mealy, containing 2 or 3 nutlets, commonly 2, about 6 mm. long, slightly ridged on the back, the nest of nutlets about 6 mm. Fig. 414. — Brown's Thorn. 25. ROUND-LEAVED THORN — Crataegus rotundifoUa (Ehrhart) Mcench Mespilus rotundijolia Ehrhart This species seems to range farther north than any other American thorn; it occurs in the rich, well-drained soil at the lower altitudes, par- ticularly along the coast from Newfoundland and Lake St. John, Quebec, south through New England and the Alleghany Mountains to northern Virginia and west to Wisconsin and northern Illinois. It is a tree sometimes 7 meters high, but more often a beautiful round- topped shrub with ascending branches; the bark is dark red- brown, scaly; the twigs are red- brown, smooth, and bear many J"'"- 415-- Round-leaved Thorn, chestnut-brovrai curved spines 2 to 7 cm. long. The leaves are ovate-orbicular or obovate, 3 to 6 cm. long, 2 to 6 cm. wide, pointe
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