496 TREES OF NORTH AMERICA 



entire; glabrous on the outer surface, villose-pubescent on the inner surface; stamens usually 

 5, sometimes 6-8; anthers large, dark reddish purple; styles usually 3, surrounded at base 

 by a narrow ring of pale tomentum. Fruit ripening and falling early in September, on 

 long slender pedicels, in many-fruited drooping clusters, obovoid to ellipsoidal, crimson, 

 lustrous, marked by occasional small dark dots, about |' long, and |' in diameter; calyx 

 enlarged, conspicuous, with erect and incurved glandular-serrate lobes, bright red toward 

 the base on the upper side; flesh thin, yellow, dry and mealy, with a disagreeable flavor; 

 nutlets usually 3, light chestnut-brown, prominently grooved and ridged on the back with 

 a broad rounded ridge, about f ' long. 



A tree, often 30 high, with a tall straight trunk 10'-15' in diameter, covered with pale 

 gray-brown or nearly white scaly bark, stout ascending branches forming an open irregular 

 rather compact head, and stout glabrous branchlets dark green more or less tinged with 

 red when they first appear, becoming bright chestnut-brown or orange-brown and lus- 

 trous, and ultimately ashy gray, and armed with occasional thick mostly straight bright 

 chestnut-brown shining spines If -2' long. 



Distribution. Rich moist hillsides and the borders of streams and swamps, neighbor- 

 hood of Montreal and southern Ontario to the coast of southern Maine, central and western 

 Massachusetts, Rhode Island, western New York, and eastern Pennsylvania; most abund- 

 ant and of its largest size on the hills of Worcester County, Massachusetts. In Sellersville, 

 Bucks County, Pennsylvania, in a form of this species (var. villipes Ashe) the young 

 branchlets, petioles, and corymbs are often puberulous and the under surface of the leaves 

 more or less hairy, especially on the midrib and veins. Passing into var. tardipes Sarg. dif- 

 fering from the type in its darker green leaves somewhat rougher on the upper surface, 

 flowers often f ' in diameter on villose pedicels, and in the shorter slightly hairy pedicels 

 of the fruit ripening early in October. 



A tree, in size, habit and bark similar to the species; southern Ontario (neighborhood of 

 Toronto, common, near London, bank of the St. Claire River below Sarnia and Walpole 

 Island, Lamberton County); Province of Quebec (Montreal, Caughuawaga, Isle Perrot, 

 St. Ann's and Hemmingford) ; central and western New York. 



101. Crataegus acclivis Sarg. 



Leaves oblong-ovate, acuminate, broad-cuneate or rounded at the entire base, coarsely 

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

 wide-spreading acuminate lateral lobes, when they unfold tinged with red, densely villose 

 on the upper surface, pubescent on the midrib and veins below, about half grown w T hen the 

 flowers open during the last week of May and then light yellow-green, slightly roughened 

 above by short white hairs and pubescent on the midrib and veins below, and at maturity 

 membranaceous, dark yellow-green and nearly smooth above, pale yellow-green and gla- 

 brous below, 2f '-3' long, and 2'-2f wide, with a stout yellow midrib, and 5 or 6 pairs of 

 primary veins extending obliquely to the point of the lobes; petioles slender, slightly wing- 

 margined at apex, glandular with numerous small dark glands, densely villose early in the 

 season, becoming puberulous or glabrous in the autumn, If -2' in length; leaves at the end 

 of vigorous shoots broad-ovate, acuminate, cordate at the wide base, deeply divided into 

 wide acute lateral lobes, and often 4'-5' long and wide, with foliaceous, lunate, coarsely 

 glandular-serrate stipules, If wide, and persistent throughout the season. Flowers f ' in 

 diameter, on slender densely villose pedicels, in broad lax many-flowered long-branched 

 hairy corymbs, their bracts lanceolate, glandular, large and conspicuous, persistent until 

 after the flowers open; calyx-tube narrowly obconic, covered with a thick coat of long 

 matted hairs, the lobes long slender, acuminate, serrate with occasional large gland- 

 tipped teeth, glabrous on the outer surface, slightly villose on the inner surface; stamens 

 usually 5; anthers pink; styles mostly 5. Fruit ripening the middle of September and soon 

 falling, on long slender slightly hairy pedicels, in many-fruited drooping clusters, short- 

 oblong, broad and rounded at the ends, yellowish red, glaucous, marked by occasional pale 

 dots, about ' long and f ' wide; calyx sessile, with usually erect enlarged coarsely serrate 



