124 MISSOURI BOTANICAL GARDEN. 



the inner faces by very broad deep cavities, about 6 mm. long, and 3 mm. 

 wide. 



i 



A shrub 1.5-2 m. high, with small stems covered with dark 

 bark, small ascending and spreading branches, and slender 

 nearly straight branchlcts orange-green and loosely covered 

 with matted white hairs w^hcn they first appear, dull reddish 

 brown and slightly pubescent at the end of their first season, 

 becoming dark dull red-brown and glabrous the following 

 year, and unarmed or armed with occasional slender short 



spines. 



Kocky banks of Spring River, Carthage, Jasper County, 

 E. J. Palmer, (No. 9 H type) May 19 and October 5, 1907. 



With leaves considerably thicker than those of the other 

 Missouri thin-leaved Tomentosae and thinner than those ot 

 the two Missouri thick-leaved species, Crataegus msperafa 

 serves to connect these two divisions of the group. The 

 prominent midribs and veins impressed above indicate, how^ 

 ever, a closer relationship with the thick-leaved species with 

 which I have placed it. 



12, Crataegus eusifera, n. sp. 



Leaves rliombic to slightly obovate, acuminate at the ends, finely 

 doubly serrate, with straight glandular teeth, and slightly divided above 

 the middle into 3 or 4 pairs of small acuminate lobes; nearly fully grown 

 when the flowers open from the 10th to the middle of May and then thin 

 but firm in texture, dark yellow-green, lustrous, and roughened above by 

 short white hairs and pale yellowish green and sparingly v-illose along the 

 midribs and veins below, and at maturity thick, light yellow-green and 

 scabrate above, pale and pubescent below, 5-6 cm. long and 3-3.5 cm. wide, 

 with stout midribs, and thin prominent primary veins deeply impressed 

 on the upper side of the leaf; petioles slender, narrowly wing-margliied to 

 below the middle, villose on the upper side while young, becoming glabrous, 

 bright rose color in the autumn, 1-1.5 cm. in length. Flowers 1.3-1.4 cm. 

 in diameter, on long slender sUghtly hairy j>edicels, in wide mostly 16-20- 

 flowered corymbs, the elongated lower peduncles from the axils of upper 

 leaves; calyx-tube narrowly obconic, slightly hairy near the base, glabrous 

 above, the lobes long, wide, laciniatoly glandular-serrate, glabrous on the 

 outer, villose on the inner surface, reflexed after anthesis; stamens 20; 

 anthers minute, pale salmon color; styles 2. Fruit ripening and falling 

 early in October, on slender drooping slightly pubescent pedicels, in few- 

 fruited clusters, oval, bright orange-red. lustrous, marked by small pale 

 dots, 1-1.2 cm. long and 8-9 cm. in diameter; calyx prominent, with a 



wide deep cavity, and small spreading and appressed coarsely serrate lobes, 



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