ROSACE^E 



483 



nut-brown and lustrous, and armed with straight or slightly curved chestnut-brown spines 

 l-j'-2' long. 



Distribution. Limestone ridges; valley of the St. Lawrence River near Montreal, 

 Province of Quebec, southward through the Champlain valley to eastern New York and 

 westward through New York, and southern Ontario to the neighborhood of Toronto. 



87. Crataegus pennsylvanica Ashe. 



Leaves ovate, acuminate, rounded or abruptly cuneate at 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 prominent midrib and primary veins below, and at 

 maturity thin, dark yellow-green and scabrate on the upper surface, paler, scabrate and 

 still somewhat villose on the midrib and veins below, 2^'-3' long, and 2'-2f ' wide; petioles 

 slender, slightly wing-margined at apex, villose through the season, occasionally glandular. 



Fig. 440 



lf'-l|' in length; leaves at the end of vigorous shoots rounded or truncate at base, coarsely 

 serrate, more deeply lobed, and often 4'-4|' long and broad, with a stout midrib, promi- 

 nent primary veins, a conspicuously glandular petiole, and large foliaceous lunate coarsely 

 glandular-serrate persistent stipules. Flowers f '-!' in diameter, on slender densely villose 

 pedicels in broad lax hairy mostly 8-15-flowered corymbs; calyx-tube narrowly obconic, 

 covered with long white hairs, the lobes long, slender, acuminate, laciniately glandular- 

 serrate, glabrous on the outer surface, villose on the inner surface; stamens 8-12; anthers 

 faintly tinged with pink; styles 3-5. Fruit ripening and falling early in October, on short 

 stout drooping slightly hairy pedicels, in 4-12-fruited clusters, short-obovoid, full and 

 rounded at apex, bright orange-red marked by small pale dots, puberulous at the ends, 

 f'-l' in diameter; calyx little enlarged, with small spreading lobes dark red on the upper 

 side, their tips often deciduous from the ripe fruit; flesh thick, orange-yellow, somewhat 

 acidulous, edible, sometimes made into jelly; nutlets 3-5, rounded at apex, acute at base, 

 rounded and slightly grooved or ridged on the back, about f ' long. 



A tree, sometimes 30 high, with a tall trunk often 18' in diameter, covered with dark 

 gray scaly bark, large spreading branches forming a wide symmetrical round-topped head, 

 and stout slightly zigzag branchlets dark orange-green and more or less tinged with red 

 when they first appear, becoming dark chestnut-brown, marked by large dark lenticels 

 and more or less pubescent in their first season, dark red-brown the following year, and 

 armed with stout straight or slightly curved chestnut-brown spines I'-lf ' long. 



Distribution. Meadows in low moist soil near Pittsburgh, Allegheny County, Penn- 

 sylvania. 



