608 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Leaves ovate-oblong, 4.5-6 cm. in length; fruit 1.2-1.5 cm. 



in diameter, 16. C. stolonifera. 



Leaves ovate, 3.5-4 cm. in length; fruit 8-10 mm. in diameter, 



17. C. modica. 

 Fruit with a glaucous bloom, 1.2-1.5 cm. in diameter. 



Leaves 7-9-lobed; petioles and pedicels stout; corymbs broad 



and open, 7-12-fiowered, 18. C. vittata. 



Leaf -lobes numerous; petioles and pedicels slender; 

 corymbs compact, 5-9-flowered, . . 19. C. sequax. 



1. Crataegus tenella Ashe. 



Ann. Carnegie Mus., I, pt. 3, 388 (1902). Sargent, Bot. Gazette, XXXV, 



108 (The Genus Crat£egus in New Castle County, Delaware). 



Leaves ovate, acuminate, abruptly cuneate or rounded at the broad 

 entire base, sharply doubly serrate above, with slender glandular teeth, 

 and divided into 4 or 5 pairs of short acuminate lateral lobes mostly 

 pointing forward, deeply tinged with red when they unfold and coated 

 above with long pale hairs, nearly half-grown when the flowers open the 

 middle of May and then light yellow-green, glabrous below and cov- 

 ered above by short white hairs, and at maturity membranaceous, 

 glabrous, dark yellow-green on the upper and pale and glaucous on the 

 lower surface, 4-6 cm. long and 3-4.5 cm. wide, with very slender 

 midribs and primary veins; petioles slender, slightly grooved on the 

 upper side, sparingly glandular, with minute scattered caducous glands, 

 1.5-2 cm. long; stipules linear, acuminate, glandular, mostly deciduous 

 before the flowers open. Flowers 1.2-1.4 cm. in diameter, on slender 

 glabrous pedicels, in broad many-flowered corymbs, with oblong-obo- 

 vate to linear scarious caducous bracts and bractlets; calyx-tube nar- 

 rowly obconic, the lobes narrow, long-pointed and acuminate, usually 

 irregularly serrate above the middle, reflexed after anthesis; stamens 

 5-10; anthers small, dark rose color; styles 2 or 3. surrounded at the 

 base by a narrow ring of hoary tomentum. Fruit ripening early in 

 September on long slender pedicels, in few-fruited drooping clusters, 

 and often persistent on the branches until October, short-oblong or 

 rarely obovate, bright scarlet, lustrous, 1-1.2 cm. long and 6-7 mm. 

 wide, calyx little enlarged, with a narrow shallow cavity, and spreading 

 closely appressed lobes often deciduous from the ripe fruit; flesh yel- 

 low, soft and pulpy; nutlets 2 or 3, rounded at the base, gradually nar- 

 rowed and acute at the apex, prominently ridged on the back, with a 

 broad high deeply grooved ridge, about 7 mm. long and 4 mm. wide. 



A shrub 3-4 m. high, with numerous erect stems covered with pale 

 gray bark, and slender nearly straight branchlets marked by small pale 

 lenticels, orange-green when they first appear, and rather dull reddish- 



