234 



TREES OF NORTH AMERICA 



nished with tufts of hairs in the axils of the primary veins, usually about 2|' long 

 and 1^' wide, turning dull orange and scarlet in the autumn before falling; their 

 petioles slender, ^'-f' long. Flowers: staminate in slender glabrous or pubescent 

 aments 2'-3' long; calyx divided into 4 or 5 broadly ovate rounded segments rather 

 shorter than the stamens; pistillate on short glabrous slender stalks, their involucral 

 scales rather shorter than the acute calyx-lobes, pubescent or puberulous; stigmas 

 bright red. Fruit short-stalked; acorn ellipsoidal or subglobose, ^'-^ long, light 

 red-brown and lustrous, inclosed for one third to nearly one half its length in a 

 thick cup-shaped cup light red-brown and lustrous on the inner surface, and cov- 

 ered by thin ovate bright light red-brown truncate erose scales. 



Distribution. Central Georgia, on Stone Mountain, Dekalb County, and on a 

 few other granite hills between the Yellow and Oconee rivers in the region south 

 and east of Stone Mountain. 



4. Quercus ellipsoidalis, E. J. Hill. Black Oak. 



Leaves oval to obovate-orbicular, acute or acuminate, truncate or broadly cune- 

 ate at the base, deeply divided by wide sinuses rounded at the bottom into 5-7 

 oblong lobes repandly dentate at the apex, or often, especially those of the upper 



piQ. 18'9 



pair, repandly lobulate, when they unfold slightly tinged with red and hoary-tomen- 

 tose, soon becoming glabrous with the exception of small tufts of pale hairs in the 

 axils of the principal veins, at maturity thin and firm, bright green and lustrous 

 above, paler and sometimes entirely glabrous below, 3'-5' long, 2^-4' wide, with 

 stout midribs and primary veins and prominent reticulate veinlets, late in the 

 autumn turning yellow or pale brown more or less blotched with purple; their peti- 

 oles slender, glabrous or rarely puberulous, l^'-2' long. Flowers: staminate in 

 puberulous aments l^'-2' long; calyx membranaceous, campanulate, usually tinged 

 with red, 2-5-lobed or parted into oblong-ovate or rounded segments, glabrous or 

 slightly villous, fringed at the apex with long twisted hairs, about as long as the 2-5 

 stamens with short filaments and oblong anthers; pistillate on stout tomentose 1-3- 

 flowered peduncles, red, their involucral scales broad, hairy, oblong, acute; calyx 

 campanulate, 4-7ilobed, ciliate on the margins. Fruit short-stalked or nearly ses- 

 sile, solitary or in pairs; acorn ellipsoidal, cylindrical to subglobose, chestnut-brown, 



