216 PROCEEDINGS OF THE ACADEMY OF [March, 



A shrub 3-4 m. high, with numerous large angular iidged stems 

 and branches covered with dark gray bark and usually spreading into 

 thickets, and slender zigzag branchlets dark olive-green tinged with 

 red when they first appear, becoming light chestnut brown, very lus- 

 trous and marked by pale lenticels in their first season and olive- 

 brown to red-brown the following year, and armed with numerous 

 stout straight or slightly curved light chestnut brown shining spines 

 2.5-5 cm. long. 



Dry gravelly soil, Forge Hill, North Heidelberg Township, near 

 Kutztown, Berks County, common; C. L. Gruber, (No. 173 type) 

 May 12 and September S, 1902; border of stony upland woods about 

 three miles north of Kutztown, C. L. Gruber, (Nos. 203 and 237) 

 May 15, August 1 and September 6, 1906. 



6. Molles. 



Leaves thin, broad, cuneate or rounded at the base; petioles long; 

 flowers large, in many-flowered corymbs; fruit subglobose or 

 obovate. scarlet, more or less pubescent at the ends, up to 2.5 

 cm. in diameter, with thick succulent flesh ; nutlets 3-5, narrowed 

 at the ends, only slightly ridged; stamens in the following species 

 usually 10; anthers pink or rose color. 



Crataegus pennsylvanica Ashe. 



Ann. Carnegie Mus., I, pt. Ill, 394 (1902). 



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

 coarsely often doubly serrate, with straight glandular teeth, and 

 slightly divided into 3 or 4 pairs of short broad acuminate lobes; 

 slightly tinged with red when they unfold, more than half-grown when 

 the flowers open the middle of May and then thin, dark yellow-green 

 and roughened above by short white hairs and villose on the midribs 

 and veins below, and at maturity thin, dark yellow-green and scabrate 

 on the upper surface, paler, scabrate and still somewhat villose on 

 the stout midribs and primary veins, 6.5-8 cm. long and 5-6 cm. wide; 

 petioles slender, slightly wing-margined at the apex, villose through 

 the season, occasionally glandular, 3-3.5 cm. in length; leaves on 

 vigorous shoots rounded or truncate at the base, very coarsely ser- 

 rate, more deeply lobed, often 10-12 cm. long and broad, with stout 

 midribs, prominent primary veins, conspicuously glandular petioles, 

 and large foliaceous lunate coarsely glandular-serrate persistent 

 stipules. Flowers 1.8-2 cm. in diameter, on slender densely villose 

 pedicels, in broad lax hairy mostly 8-15-flowered corymbs, with 

 oblong-obovate to linear-obovate glandular bracts and bractlets, the 



