448 



TREES OF NORTH AMERICA 



mostly straight teeth, and often slightly lobed above the middle, deeply tinged with red 

 and covered with pale hairs when they unfold, nearly fully grown when the flowers open 

 about the 1st of May and then smooth above, and glabrous below with the exception of 

 axillary tufts of pale hairs, and at maturity subcoriaceous, dark green and lustrous on the 

 upper surface, paler on the lower surface, If '-2' long, and I'-lf ' wide, with a prominent 

 midrib and slender primary veins; turning orange, yellow, and brown in the autumn; petioles 

 slender, covered while young like the upper side of the base of the midrib with pale decid- 



Fig. 404 



uous hairs, ^'-f ' in length; leaves, at the end of vigorous shoots often rounded or subcordate 

 at base, more or less deeply lobed, and 2^ '-3' long and broad, with a stout broadly winged 

 glandular petiole. Flowers about f ' in diameter, on elongated glabrous or sparingly hairy 

 pedicels, in compact few-flowered nearly glabrous corymbs; calyx broadly obconic, glabrous, 

 the lobes gradually narrowed from a broad base, slender, acuminate, entire, or furnished 

 with occasional minute glandular teeth, slightly villose on the inner surface; stamens 20; 

 anthers white faintly tinged with pink; styles 3-5. Fruit ripening in October, on elongated 

 slender pedicels, in few-fruited drooping clusters, globose or depressed-globose, red, about \' 

 in diameter; calyx enlarged, with spreading or reflexed lobes villose on the upper side; nut- 

 lets 3-5, narrowed and acute at the ends, rounded and broadly grooved on the back, about 

 I' long. 



A tree, 18-20 high, with a short trunk sometimes 10' in diameter, stout ascending or 

 spreading branches forming a wide head, unarmed branchlets puberulous while young, 

 soon glabrous, becoming light reddish brown. 



Distribution. Low moist woods and the banks of streams; southeastern Tennessee. 



53. Crataegus micracantha Sarg. 



Leaves oblong-obovate to oval, acute, acuminate, or rarely rounded at apex, gradually 

 or abruptly narrowed from above or from below the middle to the cuneate entire base, 

 coarsely crenulate-serrate, and occasionally 3-lobed above with short broad acute lateral 

 lobes, w T hen they unfold villose on the upper and hoary-tomentose on the lower surface, more 

 than half grown when the flowers open about the middle of May and then membranaceous 

 and slightly villose above with short scattered pale hairs, and at maturity thin but firm 

 in texture, dark yellow-green, lustrous and smooth above, paler and tomentose below on 

 the slender midrib and 3 or 4 pairs of very obscure primary veins, 2'-2|' long, and l'-l \ f wide; 

 petioles slender, tomentose early in the season, becoming glabrous or pubescent, %'-!' in 

 length; leaves at the end of vigorous shoots often broadly rhombic to obovate, acuminate, fre- 

 quently deeply 3-lobed or divided into 2 or 3 pairs of short lateral lobes, usually 2*'- 3' long. 



