. 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. 462 The Thorn Trees 21. BUSH'S THORN — Oratsegns pyriformis Britton Bush's thorn occurs in rich bottom lands of southeastern Missouri. It is a tree 8 to 9 meters high, with spreading branches forming a broad crown; the twigs are Hght green and long-hairy when young, becoming gray and smooth, and have an occasional sUm, chestnut-brown spine 2 to 4 cm. long. The leaves are broadly oval or obo- vate-oval, 3 to 7 cm. long, 2
. 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. 462 The Thorn Trees 21. BUSH'S THORN — Oratsegns pyriformis Britton Bush's thorn occurs in rich bottom lands of southeastern Missouri. It is a tree 8 to 9 meters high, with spreading branches forming a broad crown; the twigs are Hght green and long-hairy when young, becoming gray and smooth, and have an occasional sUm, chestnut-brown spine 2 to 4 cm. long. The leaves are broadly oval or obo- vate-oval, 3 to 7 cm. long, 2 to 6 cm. wide, pointed at the apex, strongly wedge- shaped at the base, sharply and some- times doubly toothed, usually slightly hairy on the upper surface when young, becoming smooth, hairy, especially along the veins beneath, yellow-green above, paler beneath, thin; leaf-staUss winged at the apex, woolly-hairy, becoming Fig. 's Thom smoother, I to 3 cm. long. The flowers are about cm. wide, in many-flowered, long-hairy corymbs; calyx-tube densely long-hairy, the lobes lanceolate, long-pointed, slightly hairy, glandular-toothed; sta- mens about 20; anthers pink; styles 4 or 5. The fruit ripens late, is oblong or pear-shaped, about 12 mm. thick, bright cherry-red, calyx-lobes reflexed; flesh light yellow, juicy; it contains 4 or 5 nutlets about 8 mm. long and about 10 nun. thick; the nutlets are ear-shaped, and are grooved on the 22. ASHE'S THORN — Crataegus Ashei Beadle Ashe's thom is known in the clay soils about Montgomery, Alabama. It is a tree sometimes 6 meters high, with ascending branches forming an oval top; the bark is hght gray or red-brown, be- coming scaly with age; the twigs are orange-brown or reddish brown, hairy, becoming hght gray, smooth, and pro- vided with slender, nearly straight spines 3 to 4 cm. long. The leaves are oblong-ovate or obo- vate, 2 to 8 cm. long, i to 6 cm. wide, abruptly long-pointed or pointed at the apex, wedge-sha
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