ROSACE^E 



465 



20; anthers large, light yellow; styles 4 or 5, surrounded at base by a broad ring of hoary to- 

 mentura. Fruit ripening late in August and early in September, on stout pedicels, in droop- 

 ing few-fruited villose clusters, short-oblong to subglobose, rounded at the ends, more or 

 less pubescent, scarlet marked by occasional large dark dots; f'-l' in diameter; calyx 

 prominent, hairy, with large erect and incurved lobes usually deciduous before the fruit 

 ripens; flesh thick, yellow, subacid, dry and mealy; nutlets 4 or 5, thin, rounded and ob- 

 scurely ridged on the back, light brown, ' long. 



Fig. 420 



A tree, sometimes 40 high, with a tall trunk often 18' in diameter, heavy wide-spreading 

 smooth ashy gray branches forming a broad round-topped and often symmetrical head, 

 and stout branchlets covered at first with a thick coat of long white matted hairs, villose 

 during their first season, becoming glabrous in their second year, and armed with occa- 

 sional straight thick bright chestnut-brown shining spines l'-2' long. 



Distribution. Low rich soil usually on the bottom-lands of streams; northern Ohio and 

 southwestern Ontario (Point Edward) to northern Missouri, eastern South Dakota, eastern 

 Nebraska, and eastern Kansas; common; near Nashville, Davidson County, Tennessee. 



69. Crataegus sera Sarg. 



Leaves oblong-ovate, acute or acuminate, rounded, truncate or slightly cordate at the 

 broad base, irregularly divided into 4 or 5 pairs of short acute lateral lobes, and sharply 

 and sometimes doubly serrate nearly to the base with straight glandular teeth, unfolding 

 about the 1st of May with the opening of the flow r ers and then covered above with short 

 soft white hairs and tomentose below, and at maturity membranaceous, dark yellow-green 

 and glabrous on the upper surface, pubescent on the lower surface, 2'-4' long, and 2|'-3' 

 wide, with a slender midrib, and thin remote primary veins extending to the point of the 

 lobes; petioles slender, tomentose, becoming pubescent, I'-l^' in length; leaves at the end 

 of vigorous shoots more deeply lobed, and often 4'-5' long and 3'-4' wide. Flowers f ' in 

 diameter, on stout densely villose pedicels, in compact many-flow T ered tomentose corymbs; 

 calyx-tube broadly obconic, coated with broad matted pale hairs, the lobes broad, acute 

 or acuminate, glandular-serrate with large dark glands, tomentose on the outer surface and 

 villose on the inner surface; stamens 20; anthers pale yellow; styles 4 or 5, usually 5. 

 Fruit ripening about the 1st of October, on stout puberulous or villose pedicels, in drooping 

 or erect few-fruited clusters, obovoid or short-oblong, dull dark red, marked by small pale 

 dots, usually slightly villose or pubescent at the ends, f ' long, and \' in diameter; calyx 

 enlarged, wjjth erect, coarsely glandular-serrate, incurved lobes often deciduous before the 

 ripening of the fruit; flesh thick, dry and mealy; nutlets usually 5, thin, light brown, 

 irregularly grooved on the back with a broad shallow groove, \' long. 



