Leaves broad-ovate, acuminate, full and rounded or concave cuneate at the entire base, sharply often doubly serrate above with straight or incurved glandular teeth, and slightly and irregularly divided above the middle into narrow acuminate spreading lobes, thin, glabrous, dark blue-green above, pale below, 2½′—3′ long, and 2¼′—2½′ wide, with a slender yellow midrib, and 4 or 5 pairs of thin primary veins extending obliquely to the point of the lobes; petioles slender, wing-margined at apex, glandular, 1′—1¼′ in length. Flowers opening the first of May, ⅔′ in diameter, on long stout pedicels, in glabrous compact 3—6 usually 5-flowered glabrous corymbs, with conspicuous glandular early deciduous bracts and bractlets; calyx-tube narrowly obconic, glabrous, the lobes slender, acuminate, glabrous, entire or sparingly glandular-serrate; stamens 10; anthers large, dark rose color; styles 4 or 5, surrounded at base by a narrow ring of pale tomentum. Fruit on stout rigid pedicels, in drooping or spreading clusters, subglobose, usually rather broader than high, angled, green more or less tinged with red, pruinose, ½′—¾′ in diameter; calyx prominent, with a short tube and much enlarged spreading or erect lobes usually deciduous at midsummer; flesh thin, greenish yellow; nutlets usually 4, rounded at the ends, deeply grooved on the back, about ¼′ long.
A tree, 15°—18° high, with a tall slender trunk, covered with dark slightly scaly bark, small erect and spreading branches forming an open irregular head, and stout slightly zigzag glabrous branchlets dark olive-green tinged with red when they first appear, dark dull reddish brown or purple and marked by small pale lenticels at the end of their first season, becoming light grayish brown in their second year, and armed with numerous stout nearly straight dark purple lustrous spines 2½′—3′ in length.
Distribution. Gravelly banks of small streams near Monteer, Shannon County, and at Carl Junction, Jasper County, Missouri.
VI. SILVICOLÆ.
Medioximæ Sarg.
CONSPECTUS OF THE ARBORESCENT SPECIES.
Fruit on short erect pedicels; leaves rounded or occasionally slightly cordate at base.58. [C. drymophila] (C). Fruit on elongated drooping pedicels. Leaves truncate, cordate or rounded at base; anthers, pale rose.59. [C. diffusa] (A). Leaves cuneate or rounded at base; anthers, dark purple.60. [C. luxuriosa] (A).
58. [Cratægus drymophila] Sarg.
Cratægus silvicola Beadl.
