458 



TREES OF NORTH AMERICA 



Distribution. Dry open places, borders of woods, and the margins of the high banks 

 of streams; common and generally distributed in northeastern Illinois. 



62. Crataegus paucispina Sarg. 



Leaves oblong-obovate, acuminate, rounded, concave-cuneate to truncate or subcordate 

 at the entire base, sharply doubly serrate above with straight glandular teeth, and deeply 

 divided into 4 or 5 pairs of acute lateral lobes spreading or pointing toward the apex of the 

 leaf, about half grown when the flowers open early in May and then light yellow-green and 

 slightly roughened above by short white hairs and paler and glabrous below, and at matur- 

 ity membranaceous, dark blue-green and scabrate on the upper surface, pale blue-green 

 on the lower surface, 2^'-3' long, and H'-2^' wide, with a slender yellow midrib, and thin 

 primary veins extending obliquely to the point of the lobes; petioles slender, usually with- 

 out glands, tinged with purple in the autumn, f '-1|' in length. Flowers f '-f ' in diameter, 

 on slender hairy pedicels, in broad 12-20-flowered slightly villose corymbs, their bracts and 

 bractlets linear to oblong-obovate, glandular, red, mostly persistent until after the flowers 



Fig. 414 



open; calyx-tube narrowly obconic, glabrous, the lobes narrow, acuminate, glandular- 

 serrate with small dark red stipitate glands, glabrous on the outer, pubescent on the inner 

 surface; stamens 10; anthers bright reddish purple; styles 4 or 5, surrounded at base by 

 tufts of pale hairs. Fruit ripening during the first half of September and soon falling, on 

 slender glabrous pedicels, in drooping clusters, obovoid to subglobose, crimson or purplish, 

 marked by numerous small pale dots, slightly pruinose, '-f ' long, and about f ' in diameter; 

 calyx small, with reflexed and appressed or erect and incurved serrate lobes dark red on the 

 upper side below the middle, often deciduous from the ripe fruit; flesh thin, yellow, juicy, 

 acid and edible; nutlets 4 or 5, thin, narrowed and acute at the ends, rounded and slightly 

 grooved or obscurely ridged on the back, about \' long. 



A tree, sometimes 25 high, with a trunk 4'-6' in diameter and often 6 long, covered 

 with dark gray or nearly black bark separating into thin plate-like scales, numerous 

 branches forming a round-topped head, and slender glabrous branchlets dark yellow-green 

 when they first appear, becoming dark reddish brown at the end of their first season, olive- 

 green in their second year, and ultimately dark gray-brown, and armed with small straight 

 light red-brown shining spines \'-\' long. 



Distribution. Woods and river banks in dry clay soil; northeastern Illinois; common. 



63. Crataegus pentandra Sarg. 



Leaves oval or ovate, acuminate, broadly cuneate or rarely rounded at the entire base, 

 divided above the middle into numerous short acute or acuminate lobes, and coarsely and 



