ROSACE.E 



491 



acuminate, coarsely glandular-serrate, glabrous on the outer surface, villose on the inner 

 surface; stamens 20; anthers pink; styles 4 or 5, surrounded at base by a narrow ring of 

 pale tomentum. Fruit ripening from the middle to the end of September, on slender puber- 

 ulous pedicels, in drooping few-fruited clusters, obovoid, broad and rounded at apex, grad- 

 ually narrowed to the rounded base, crimson, lustrous, marked by small pale dots, |'-f ' 

 long, ' i' in diameter; calyx only slightly enlarged, with closely appressed coarsely serrate 

 lobes often deciduous from the ripe fruit; flesh yellow, thin, acidulous, juicy; nutlets 4 or 5, 

 thin, gradually narrowed and acute at the ends, irregularly ridged and sometimes grooved 

 on the back, about f ' long. 



A tree, 25-30 high, with a trunk sometimes a foot in diameter and 6 or 7 long, cov- 

 ered with close light gray bark tinged with red and divided by shallow fissures into small 

 plates, stout ascending branches forming an open irregular often round-topped head, and 

 slender nearly straight branchlets densely villose when they first appear, dark orange color 

 tinged with red and sparingly villose when the flowers open, becoming bright red-brown 

 and lustrous at the end of their first season and dark dull reddish brown the following year, 

 and sparingly armed with slender nearly straight red-brown shining spines If '-2' long. 



Distribution. Open woods near the borders of streams in moist rich soil; northeastern 

 Illinois, (Thatcher's Park, Glendon Park, and River Forest, Cook County) ; not common. 



96. Crataegus assurgens Sarg. 



Leaves broad-ovate, acuminate, rounded or rarely cuneate at the wide entire base, 

 sharply doubly serrate above with straight gland-tipped teeth, and slightly divided, 

 into 3 or 4 pairs of small acuminate lobes, about one third grown when the flowers open 



Fig. 448 



the middle of May and then roughened above by short white hairs and glabrous or spar- 

 ingly villose below, with persistent hairs on the slender yellow midrib, and on the veins 

 arching obliquely to the point of the lobes, and at maturity membranaceous, dull dark 

 green and scabrate on the upper surface, light yellow-green on the lower surface, 2f '-3% ' 

 long, and 2jV2f wide; petioles slender, villose early in the season, becoming pubescent, 

 l'-l' in length; leaves at the end of vigorous shoots often deeply lobed, coarsely serrate, 

 sometimes 4' long and wide, with long stout glandular petioles and foliaceous lunate acu- 

 minate coarsely glandular-serrate persistent stipules. Flowers f'-f ' m diameter, on short 

 villose pedicels, in compact 8-15-flowered hairy corymbs, with oblong, acuminate, glandu- 

 lar bracts and bractlets, deciduous with the opening of the flowers; calyx-tube narrowly 

 obconic, sparingly villose, the lobes long, narrow, acuminate, tipped with minute red 



