282 TREES OF NORTH AMERICA 



^'_' wide, conspicuously reticulate-venulose, falling early in the spring with the 

 appearance of the new leaves; their petioles stout, tomentose, about ^' long. 

 Flowers unknown. Fruit sessile, solitary or in pairs, ripening in June; acorn oval 



or ovate, '-f ' long, \' broad, light brown and lustrous, furnished at the acute apex 

 with a narrow ring of pale pubescence, inclosed for about one half its length in a 

 thin shallow tomentose cup light green and pubescent within, and covered by thin 

 ovate regularly and closely imbricated light red-brown scales ending in short 

 rounded tips and coated on the back with pale tomentum. 



A tree, 25-30 high, with a short trunk 6'-8' in diameter, dividing not far from 

 the ground into numerous stout wide-spreading branches forming a broad irregular 

 head, and slender branchlets bright red-brown more or less thickly coated with pale 

 tomentum at midsummer, covered during their second and third years with thin 

 dark brown nearly black bark broken into small thin closely appressed scales. 

 Wood light brown, with thick pale sapwood. 



Distribution. Forming an open forest on the Mule Mountains, Cochise County, 

 southeastern Arizona. 



44. Quercus reticulata, H. B. K. 



Leaves broadly obovate, obtuse and rounded or rarely acute at the apex, usually 

 cordate or occasionally rounded at the narrow base, repandly spinose-dentate above 

 the middle or only toward the apex, with slender teeth, and entire below, when they 

 unfold coated with dense fulvous tomentum, at maturity thick, firm, and rigid, dark 

 blue and covered with scattered stellate clusters of hairs above, paler and coated 

 with thick fulvous pubescence below, l'-5' long, f-4' broad, with thick midribs, 

 running to the points of the teeth or arcuate and united within the slightly revolute 

 margins, and very conspicuous reticulate veinlets; their stout petioles about \' long. 

 Flowers: staminate in short tomentose aments in the axils of leaves of the year; 

 calyx light yellow, hirsute, with pale hairs, divided into 5-7 ovate acute segments; 

 pistillate in spikes on elongated peduncles, clothed like their involucral scales with 

 hoary tomentum; stigmas dark red. Fruit usually in many-fruited spikes or occa- 

 sionally in pairs, or rarely solitary, on slender hirsute or glabrous peduncles 2'-5' 

 long; acorn oblong, rounded or acute at the pilose apex, broad at the base, about 

 ^' long, inclosed for about one fourth its length in a shallow cup-shaped cup dark 



