384 



TREES OF NORTH AMERICA 



or incurved teeth, nearly fully grown when the flowers open at the end of March or 

 early in April and then roughened above by short rigid white hairs, whitish and 

 pubescent below, at maturity subcoriaceous, dark green, lustrous and nearly gla- 

 brous on the upper surface, on the lower surface pale and pubescent, especially on 

 the thin midribs and slender primary veins, l^'-2' long, |'-1' wide; their petioles 

 comparatively slender, winged above, at first densely villose, becoming glabrous, 

 usually about V long. Flo-wers f'-|' in diameter, on slender villose pedicels, in 

 compact mostly 4-5-flowered compound villose corymbs; calyx-tube narrowly 

 obconic, thickly coated with long matted pale hairs, the lobes slender, acuminate, 

 sparingly villose or nearly glabrous on the outer surface, villose on the inner sur- 

 face, entire or slightly serrate; stamens 20; anthers yellow; styles 2 or 3, surrounded 

 at the base by a narrow ring of pale hairs. Fruit ripening early in October, on 



slender pedicels, in few-fruited drooping puberulous clusters, subglobose, orange 

 with a red cheek, about ^' in diameter; calyx-tube slightly enlarged, with spreading 

 or incurved lobes; flesh thin and yellow; nutlets 2 or 3, slightly ridged on the back, 

 about ^' long. 



A tree, 20-2o high, with a tall trunk 8'-10' in diameter, covered with dark gray 

 scaly bark, stout branches spreading into a broad flat-topped head, and slender 

 branchlets covered at first with matted white hairs, becoming glabrous and light 

 orange-brown at the end of their first season, and pale gray-brown the following 

 year, and unarmed or armed with occasional slender nearly straight red-brown spines. 



Distribution. Borders of prairies and low moist soil a few miles west of Ope- 

 lousas, Louisiana. 



19. Crataegus edura, Beadl. 



Leaves oblong-obovate, rounded and obtuse or occasionally acute at the apex, 

 gradually narrowed from above the middle to the wedge-shaped base, entire below, 

 serrate only at the apex, nearly fully grown when the flowers open early in April 

 and then thin, dark green and puberulous above especially along the midribs, very 

 pale and villose below, at maturity thick and coriaceous, 1^-1^' long, l^'-lf wide, 

 with slender midribs, and primary veins within the parenchyma, turning in the 

 autumn orange, yellow, or brown; their petioles slender, winged above, light yellow, 



