504 



TREES OF NORTH AMERICA 



angled, dark crimson, very lustrous, marked by numerous large pale dots, f long, and -' 

 wide; calyx much enlarged and conspicuous, with spreading or erect lobes bright red on 

 the upper side near the base; flesh thick, firm, subacid, more or less deeply tinged with red; 

 nutlets 5, comparatively small, light-colored, narrow at the ends, acute at apex, rounded 

 at base, rounded and slightly ridged on the back, about ' long. 



F.g. 460 



A tree, sometimes 20 high, with a stem S'-IO' in diameter, covered with dark brown 

 scaly bark, stout spreading light gray branches forming a broad handsome head, and stout 

 nearly straight glabrous bright chestnut-brown very lustrous branchlets armed with thick 

 dark reddish purple shining spines l^'-2' long. 



Distribution. Dry woods in the neighborhood of St. Louis, Missouri; in eastern Kansas. 



XI. ROTUNDIFOLLE. 



Coccineos Sarg. 

 CONSPECTUS OF THE ARBORESCENT SPECIES. 



Stamens 10; leaves coriaceous. 



Leaves elliptic or obovate; fruit subglobose, dark crimson; anthers pale yellow. 



109. C. rotundifolia (A). 



Leaves elliptic or ovate; fruit short-oblong to oblong-obovoid, bright carmine-red; 

 anthers rose color. 110. C. Jonesae (A). 



Stamens 20; leaves subcoriaceous, rhombic to oblong-obovate; fruit short-oblong to sub- 

 globose, dark dull red or rusty orange-red; anthers pale yellow. 



111. C. Margaretta (A, C). 



109. Cratsegus rotundifolia Moen. 



Cratcegus coccinea var. rotundifolia Sarg. 



Leaves elliptic or obovate, acute or acuminate, gradually narrowed from above the mid- 

 dle to the cuneate entire base, finely and often doubly serrate above with incurved or 

 straight teeth tipped with minute dark glands, and divided above the middle into several 

 short acute lateral lobes, about half grown when the flowers open at the end of May, and 

 then thin, light yellow-green and glabrous, and at maturity coriaceous, dark green, smooth 

 and lustrous on the upper surface, paler on the lower surface, l|'-2' long, and l'-l' wide, 



