548 



TREES OF NORTH AMERICA 



calyx narrowly obconic, glabrous, the lobes linear-lanceolate, long-acuminate, finely gland- 

 ular-serrate; stamens 5-15; anthers small, pale yellow; styles 3, surrounded at base by a 

 thick tuft of pale tomentum. Fruit in loose drooping clusters, subglobose, scarlet, \' in 

 diameter, only the base of the reflexed calyx-lobes persistent on the ripe fruit ; flesh yellow, 

 thick, dry and mealy; nutlets 3, rounded and prominently ridged on the back, \' long, 

 the ventral depression wide, shallow, irregular, often obscure. 



A tree, 15-20 high, with a trunk 6' to 8' in diameter, spreading horizontal branches 

 forming a broad round-topped head, and stout slightly zigzag glabrous branchlets marked 

 by oblong pale lenticels, dark chestnut-brown during their first season, becoming ashy gray 

 during their second year, and armed with slender straight or curved spines l-|'-2' in length; 

 or often a tall intricately branched shrub. 



Distribution. Valley of the St. LawTence River, near Montreal, Province of Quebec 

 to the neighborhood of Toronto, southern Ontario; northern and western Vermont; 

 southern New Hampshire (slopes of Little Monadnock Mountain) ; western Massachu- 

 setts, and western New York. 



153. Crataegus virilis Sarg. 



Leaves oblong-obovate, acuminate or rounded and short-pointed at apex, concave- 

 cuneate and gradually narrow r ed to the acute entire base, finely doubly serrate above with 

 straight glandular teeth, and slightly divided above the middle into 3 or 4 pairs of small 

 acuminate lobes, nearly fully grown when the flowers open during the first week of June 

 and then thin, yellow-green, smooth and slightly hairy above and pale bluish green and 

 covered below with short white hairs most abundant on the stout yellow midrib and slender 

 primary veins, and at maturity thin, glabrous, dark green and lustrous on the upper sur- 

 face, slightly villose on the low y er surface, 2^'-3' long, and If '-2' wide; petioles stout, wing- 

 margined often to below the middle, slightly villose on the upper side early' in the sea- 

 son, soon glabrous, f'-l' in length; leaves at the end of vigorous shoots subcoriaceous, 

 oval to rhombic, acuminate, often long-pointed, 3'-4' long, and 2'-2^' wide, w y ith a rose- 

 colored midrib and stout broadly winged petiole. Flowers about %' in diameter, on 

 slender villose pedicels, in broad lax hairy usually 15-18-flowered corymbs; calyx-tube 

 narrowly obconic, coated with long matted pale hairs, the lobes slender, acuminate, irregu- 

 larly glandular-serrate near the middle, glabrous on the outer, slightly villose on the inner 

 surface, reflexed after anthesis; stamens 20, anthers slightly tinged with pink, styles 4 or 

 5. Fruit ripening from the middle to the end of September, on puberulous reddish pedicels, 

 in erect or spreading few-fruited clusters, short-oblong to ovoid, scarlet, lustrous, pubescent 

 especially near the rounded ends, marked by small dark dots, '-' long, and about \\' in 



