ROSACES 



443 



matted hairs, becoming glabrous, '-!' in length; leaves at the end of vigorous shoots 

 ovate, rounded or broad-cuneate at base, coarsely serrate, usually slightly lobed above the 

 middle, and often 2|'-3' long and 1^' wide. Flowers \' in diameter on slender villose pedi- 

 cels, in usually 7-12-flowered hairy corymbs; calyx-tube narrowly obconic, villose, the lobes 

 gradually narrowed from a broad base, short, acute, entire, slightly villose; stamens 20; 

 anthers yellow; styles 5. Fruit on long slender glabrous or nearly glabrous drooping stems 

 in few-fruited clusters, subglobose, orange-red, marked by small pale dots, about \' in 

 diameter: calyx prominent, with a deep narrow cavity pointed in the bottom, and closely 



Fig. 398 



appressed lobes; flesh thin, dry and mealy; nutlets 5, acute at base, rounded at apex, ridged 

 on the back with a low grooved ridge, about \' long and \' wide. 



A tree, 20-25 high, with a trunk 8'-10' in diameter, covered with dark rough scaly bark, 

 and slender slightly zigzag branchlets, hoary -tomentose when they first appear, light red- 

 dish brown, marked by pale lenticels and glabrous or sometimes pubescent near the end 

 in their first autumn, and ashy gray the following year, and armed with slender nearly 

 straight chestnut-brown spines l'-l' in length. 



Distribution. Uplands in dry sandy soil, Fulton, Hempstead County, near Texacana, 

 Bowie County, Arkansas; and in the valley of the lower Brazos River (near Columbia, 

 Brazoria County), Texas. 



47. Crataegus arborescens Ell. 



Leaves elliptic to oblong-obovate, acute, acuminate or rarely rounded and abruptly 

 short-pointed and slightly lobed at apex, gradually narrowed cuneate and entire at base, 

 and coarsely doubly serrate above the middle with incurved glandular teeth, villose on the 

 upper side of the midrib with short white hairs when they unfold, and at maturity thin, 

 glabrous, dark green and lustrous on the upper surface, paler and often furnished on the 

 lower surface with small axillary tufts of pale hairs, l'-2' long, and f '-!' wide, with a slen- 

 der midrib and primary veins; petioles slender, glabrous, f'-l' in length; leaves at the end 

 of vigorous shoots oval to oblong-ovate or elliptic, acuminate, abruptly or gradually nar- 

 rowed and cuneate at base, more or less deeply lobed with acuminate lateral lobes, often 

 2^' long and 1 j' wide, their petioles stout, and glabrous early in the season. Flowers \' in 

 diameter, on slender pedicels, in wide many-flowered compound corymbs; calyx-tube nar- 

 rowly obconic, glabrous or slightly pilose, the lobes slender, acuminate, entire, glabrous 

 or slightly villose on the inner surface, deciduous from the ripe fruit; stamens 20; anthers 



