474 



TREES OF NORTH AMERICA 



upper surface, pale and pubescent on the lower surface on the midrib and primary veins, 

 2'-2|' long, and l' to nearly ;}' wide: petioles slender, glandular, often more or less winged 

 above, at first tomentose, becoming nearly glabrous, f '-!' in length: leaves at the end of 

 vigorous shoots broad-ovate, truncate or slightly cordate at the broud base, more deeply 

 lobed, often 2'-8' long and wide, the petioles wing-margined at apex often glandular, 

 and l'-l'j' in length. Flowers about f ' in diameter, in broad loose tomentose corymbs: 

 ralyx-tube broadly obconic, villose with long matted hairs, the lobes lanceolate, villose, 

 and glandular with large red stipitate glands: stamens 20; anthers small, nearly white; 

 styles 5, surrounded at base by a thin ring of pale tomentum. Fruit ripening early in 

 October and falling gradually until after midwinter, on stout pedicels, in erect slightly 

 villose few-fruited clusters, short-oblong to subglobose. crimson, lustrous, marked by large 

 scattered pale dots, slightly hairy toward the ends, '-f ' long. $'-' in diameter: calyx 

 prominent, the lobes gradually narrowed from a broad base, elongated, glandular, villose. 



Fig. 430 



spreading or reflexed, often deciduous before the fruit ripens; flesh thin, pale yellow. 

 dry and mealy; nutlets 5, thin, rounded and irregularly ridged on the back, J' long. 



A tree, 18-30 high, with a trunk 6'-8' in diameter, stout spreading branches forming 

 a broad round-topped symmetrical head, and stout zigzag branchlets dark green and 

 covered with matted pale hairs when they first appear, soon becoming light orange-brown 

 and very lustrous, and armed with numerous stout straight or slightly curved dark chest- 

 nut-brown shining spines 2'-2' long. 



Distribution. Limestone ridges near the St. Lawrence River at Chateaugay, Caugh- 

 nawaga, and La Tortue in the Province of Quebec. 



79. Crataegus corusca Sarg. 



Leaves ovate, acute, truncate, rounded or slightly cordate at the broad base, regularly 

 divided into 4 or 5 pairs of short acute lateral lobes, and doubly serrate with straight 

 glandular teeth, when they unfold covered above with short soft pale hairs and glabrous 

 below, about a third grown when the flowers open the middle of May, and at maturity thin 

 but firm and rigid in texture, glabrous, dark yellow-green, bright and lustrous above, 

 pale yellow-green below, 2'-2|' long and wide, with a slender pale midrib and primary 

 veins; petioles slender, villose early in the season, soon becoming glabrous and dark red 

 below the middle, lf'-2|' in length; leaves at the end of vigorous shoots frequently divided 

 into narrow acute lateral lobes, and often 3^'^' long and wide. Flowers f ' in diameter. 

 on stout villose pedicels, in compact narrow many-flowered corymbs covered with 

 matted pale hairs: calyx-tube narrowly obconic, glabrous, or villose toward the base, the 



