652 PROCEEDINGS OF THE ACADEMY OF [Sept., 



A shrub 1-2 m. high, with small erect stems and slender slightly 

 zigzag branchlets marked by numerous small pale lenticels, orange- 

 green more or less tinged with red when they first appear, bright chest- 

 nut-brown and very lustrous during their first winter, and dull dark 

 gray or brown tinged with red the following year, and armed with 

 slender slightly grooved red-brown or purplish spines often pointing 

 toward the base of the branch, and 4-5 cm. in length. 



Bucks county: Roadsides near Sellersville, Fretz and Sargent (No. 

 162, type!), September, 1902; C. D. Fretz (No. 162), May, 1905, (No. 

 199), May, 1905. 

 16. Crataegus schweinitziana n. sp. 



Leaves rhombic or slightly obovate, acuminate, gradually narrowed 

 and eoncave-cuneate at the entire or occasionally glandular base, finely 

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

 into 3 or 4 pairs of short broad acuminate lobes, nearly one-third grown 

 when the flowers open about the 20th of May and then membrana- 

 ceous, light yellow-green and glabrous with the exception of a few short 

 hairs on the upper side of the midribs, and at maturity subcoriaceous, 

 glabrous, dark yellow-green on the upper and paler on the lower sur- 

 face, 4-5 cm. long and 3-4 cm. wide, with thin prominent yellow mid- 

 ribs, and slender primary veins arching obliciuely to the points of the 

 lobes; petioles slender, grooved on the upper side, more or less wing- 

 margined at the apex, glandular, with minute stipitate dark mostly 

 deciduous glands, 1-1.5 cm. in length; leaves on vigorous shoots 

 broadly ovate, full and rounded or abruptly cuneate at the wide base, 

 coarsely serrate, more deeply lobed, 5-6 cm. long and 4.5-5 cm. wide, 

 with thick midribs and stout conspicuously glandular petioles broadly 

 winged below the middle. Floicers 1.7-1.8 cm. in diameter, on slender 

 glabrous pedicels, in 4-6-flowered simple corymbs, with linear-obovate 

 to linear-acuminate glandular bracts and bractlets, fading pink, and 

 usually persistent until after the petals have fallen; calyx-tube nar- 

 rowly obconic, the lobes broad, acuminate, finely glandular-serrate 

 above the middle, glabrous, reflexed after anthesis; stamens 8-10, 

 usually 10 ; anthers red ; styles 3 or 4. Fruit ripening late in October, 

 on slender pedicels, in spreading few-fruited clusters, oblong, full and 

 rounded at the ends or often sometimes narrowed at the base, 1.2-1.4 

 cm. long, 8-9 mm. thick, dark red ; calyx enlarged and prominent with 

 a short tube, a wide shallow cavity, and spreading lobes mostly decidu- 

 ous from the ripe fruit ; flesh thin, yellowish-green, dry and mealy ; nut- 

 lets 3 or 4, gradually narrowed and rounded at the ends, ridged on the 

 back, with a high narrow ridge. S-9 mm. long and about 5 mm. wide. 



