ROSACEA 



431 



forming a handsome symmetrical head, and stout branchlets dark green and coajied 

 with matted pale hairs when they first appear, becoming light red-brown, and light 

 orange-brown and very lustrous in their second year, and armed with thick nearly 

 straiglit bright chestnut-brown spines often 3' in length. 



Distribution. Sandy shores of Lake Zurich, Lake County, Illinois. 



C4. Crataegus Kelloggii, Sarg. 



Leaves broadly ovate to suborbicular, rounded and often short-pointed at the 

 apex, rounded, broadly cuneate or truncate at the entire base, coarsely serrate above, 

 with straight gland-tipped teeth, and divided usually only above the middle into 



several short broad acute or acuminate lobes, about half grown when the flowers 

 open during the last week of April and then very thin, yellow-green, covered above 

 with short pale hairs and pubescent below along the midribs and veins, and at matu- 

 rity thin but firm in texture, dark yellow-green, glabrous and smooth on the upper 

 surface, pale and glabrous on the lower surface with the exception of a few hairs 

 near the base of the thin yellow midribs and of the 4 or 5 pairs of slender prominent 

 primary veins arching to the points of the lobes, 2'-2^' long, 1|'-2|' wide, and often 

 broader than long; their petioles slender, slightly winged at the apex, villose while 

 young, with long matted white hairs, becoming glabrous, and |'-1' long. Flowers 

 |' in diameter, on slender hairy pedicels, in compact 5-10-flowered villose compound 

 corymbs, with oblong-obovate to linear acuminate glandular bracts and bractlets 

 mostly persistent until the flowers open; calyx-tube broadly obconic, slightly hairy 

 at the base, glabrous above, the lobes slender, acuminate, glandular, with minute 

 dark red stipitate glands, or entire, glabrous on the outer, sparingly villose on the 

 inner surface; stamens 20; anthers pale rose color; styles 5. Fruit ripening at the 

 end of September and soon falling, on long slender glabrous pedicels, in few-fruited 

 drooping cbasters, subglobose to short-ovate, bright yellow, marked by many small 

 pale dots, f'-l' in diameter; calyx small, with spreading reflexed lobes slightly vil- 

 lose toward the apex and often deciduous from the ripe fruit; flesh thin, yellow, 

 dry and mealy; nutlets 5, rounded and very slightly grooved on the back, about 



^' long. 







A tree, 20-25 high, with a tall trunk 4-5' in diameter, covered with nearly black 



