1905.] NATURAL SCIENCES OF PHILADEI-PHIA. 611 



lets 2-3, rounded at the base, gradually narrowed and acute at the 

 apex, ridged on the back, with a low grooved ridge, 6-7 mm. long and 

 3-4 mm. wide. 



An arborescent shrub 3-4 m. high, with stout ascending stems, and 

 slender nearly straight branchlets marked by occasional small pale 

 lenticels, light orange to reddish-brown and lustrous during their first 

 winter and ashy-gra}^ the following year, and armed with slender 

 slightly curved bright chestnut-brown shining spines 2.5-3 cm. in length. 



Bucks county: Hillside near Sellersville, C. D. Fretz (No. 140, type), 

 May and September, 1901, September, 1903. 

 4. Crataegus collinsiana n. sp. 



Leaves oblong-ovate, acuminate, gradually narrowed and cuneate or 

 full and rounded at the entire base, finely often doubly serrate, with 

 broad straight glandular teeth, and slightly lobed, with numerous short 

 lobes, more than half-grown when the flowers open the middle of May 

 and then membranaceous, light yellow-green and roughened above by 

 short white hairs and pale below, and at maturity thick and firm in 

 texture, dark blue-green and scabrate on the vipper , and light bluish-green 

 on the lower surface, 5-6 cm. long and 4-5 cm. wide, with slender mid- 

 ribs, and 5 or 6 pairs of thin primary veins extending very obliquely 

 to the points of the lobes; petioles slender, slightly wing-margined at 

 the apex, usually without glands, 2-3 cm. long. Flowers 1-1.2 cm. in 

 diameter, on slender pedicels, in very compact 4-6-flowered corymbs, 

 with linear glandular caducous bracts and bractlets; calyx-tube nar- 

 rowly obconic, the lobes gradually narrowed and acuminate, glandular- 

 serrate especially above the middle, tipped with dark red glands, re- 

 flexed after an thesis; stamens 3-7; anthers red; styles 2 or 3. Fruit 

 ripening and falling before the middle of September on short pedicels, 

 in few-fruited clusters, short-oblong, fvill and rounded at the ends, dark 

 crimson, lustrous, about 1 cm. long and 8 mm. wide; calyx little en- 

 larged, with a deep narrow cavity, and spreading lobes, their tips de- 

 ciduous from the ripe fruit; flesh thick, yellow, soft and pulpy; nutlets 

 2 or 3, gradually narrowed and acute at the ends, prominently ridged 

 on the back, with a broad deeply grooved ridge, 6-7 mm. long and 4 

 mm. wide. 



A tree 3-4 m. high, with a short erect trunk 7-8 cm. in diameter, and 

 slender zigzag branchlets marked by numerous small pale lenticels, 

 dark orange color when they first appear, dark dull red-brown during 

 their first year, becoming dark gray-brown the following season, and 

 armed with very stout straight or slightly curved bright red ultimately 

 dark gray-brown spines 2.5-4 cm. in length. 



