ROSACEJE 415 



open; calyx-tube narrowly obconic, glabrous, the lobes abruptly narrowed at the 

 base, slender, acuminate, entire or sparingly glandular on the margins; stamens 5- 

 10, usually 5; anthers pink; styles 3-5, surrounded at the base by tufts of pale hairs. 

 Fruit ripening the 1st of September and soon falling, on slender pedicels, in few- 

 fruited drooping clusters, obovate or rarely short-oblong, bright reddish purple, 

 marked by small scattered pale dots, f'-f' long, '-' wide; calyx much enlarged, 

 with spreading lobes, their tips mostly deciduous from the ripe fruit; flesh thin, 

 yellow, juicy, pleasantly acid; nutlets 3-5, thin, rounded and ridged on the back, with 

 a low ridge, about \' long. 



A tree, sometimes" 25 high, with a trunk 6' in diameter and 3-6 long, covered 

 with dark gray bark separating into thin plates, in falling disclosing the yellow inner 

 bark, numerous ascending branches forming an oblong or pyramidal crown, and slen- 

 der branchlets dark dull red-brown during their first season, becoming dark gray- 

 brown the following year, and unarmed or armed, with slender nearly straight dull 

 red-brown ultimately ashy gray spines !'-!' long; or often shrubby, with numerous 

 stems spreading into small clumps. 



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

 banks of streams; common and generally distributed in the neighborhood of Chicago, 

 Illinois. 



49. Crataegus paucispina, Sarg. 



Leaves oblong-obovate, acuminate, rounded, coucave-cuneate to truncate or sub- 

 cordate 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 point- 

 ing 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 maturity membranaceous, dark blue-green and 

 scabrate on the upper surface, pale blue-green on the lower surface, 2 '-3' long, !'- 

 2^' wide, with slender yellow midribs and thin primary veins extending obliquely 

 to the points of the lobes; their petioles slender, usually without glands, tinged with 

 purple in the autumn, f '-!' long. Flowers -' f ' in diameter, on slender hairy pedi- 

 cels, in broad 12-20-flowered slightly villose compound corymbs, with linear to 

 oblong-obovate glandular red bracts and bractlets mostly persistent until after the 



