Distribution. Central Iowa (Steamboat Rock, Harden County, Cedar Rapids, Linn County), southward to Missouri (Hannibal, Marion County, Webster, St. Louis County to the neighborhood of Springfield, Greene County), and eastward to northeastern Illinois (Downers Grove, Dupage County); through north central Indiana to southern Michigan (Kalamazoo and Ingham Counties); through central and southern Ohio to the southeastern part of the state (Washington County); southeastern Ontario (London and Oakwood); in central Tennessee (West Nashville, Davidson County).
XII. INTRICATÆ.
CONSPECTUS OF THE ARBORESCENT SPECIES.
Stamens 10; leaves broad-ovate to oval. Fruit depressed-globose, yellow-green flushed with russet-red; anthers pale yellow; calyx-lobes eglandular.112. [C. Boyntonii] (A, C). Fruit subglobose, red or russet-red; anthers pale rose color; calyx-lobes glandular with stalked glands.113. [C. Buckleyi] (A). Stamens 20. Leaves oval to ovate or oblong-obovate; fruit short-oblong, dull red, often with a bright russet face; stamens usually 5—15; anthers small, pale yellow.114. [C. venusta] (C). Leaves oblong-ovate to elliptic or ovate; fruit subglobose to short-oblong, yellow or orange-yellow, more or less flushed with red; anthers large, purple.115. [C. Sargentii] (C).
112. [Cratægus Boyntonii] Beadl.
Leaves broad-ovate to oval, acute, rounded or cuneate at the entire glandular base, sharply and often doubly serrate above with glandular teeth, and frequently divided into 2 or 3 pairs of short broad acute lateral lobes, when they unfold deep bronze-red, slightly glandular and viscid, nearly fully grown when the flowers open early in May, and then membranaceous and glabrous or occasionally slightly pilose, and at maturity subcoriaceous, glabrous, yellow-green on the upper surface, pale on the lower surface, 1′—2½′ long, and 1′—2′ wide, with a thin pale yellow midrib and 4—7 pairs of slender veins; petioles stout, glandular often to the base with bright red glands, slightly winged above, usually about ½′ in length; leaves at the end of vigorous shoots often as broad as long, truncate or cordate at base, and more coarsely dentate and more deeply lobed. Flowers about ¾′ in diameter, on short slender pedicels, in compact 4—10-flowered compound corymbs; calyx-tube broadly obconic, the lobes abruptly narrowed from a broad base, acute or rounded at apex, entire or obscurely and irregularly glandular-serrate above the middle; stamens 10; anthers large, pale yellow; styles 3—5, surrounded at base by a broad thick ring of hoary tomentum. Fruit ripening and falling early in October, on short stout pedicels, in few-fruited erect clusters, depressed-globose, more or less angled, yellow-green flushed with russet-red, marked with small dark dots, usually about ½′ in diameter; calyx prominent, the large spreading lobes often deciduous before the fruit ripens; nutlets 3—5, acute or acuminate at apex, rounded at the narrow base, about ¼′ long.
A tree, occasionally 20° high, with a tall straight trunk 6′—8′ in diameter, sometimes armed with long gray compound spines, stout ascending branches forming a narrow open irregular or occasionally a round-topped head, and glabrous branchlets furnished with many thin nearly straight light chestnut-brown spines 1½′—2′ long; or more often a shrub, with numerous stems.
Distribution. Banks of streams, the borders of fields and upland woods in the southern Appalachian foothill region from southern Virginia to northern Georgia; in northern Alabama, southeastern Kentucky, and eastern Tennessee; sometimes ascending to altitudes of 3000° above the sea.