FAGACE^ 



283 



brown and pubescent within, hoary tomentose without and covered by small ovate 

 acute scales with thin free scarious tips, slightly thickened and rounded on the back 

 at the bottom of the cup. 



A tree, rarely more than 40 high, with a trunk 1 in diameter, and stout branch- 

 lets coated at first with thick fulvous tomentum, light orange color and more or less 

 thickly clothed with pubescence during their first winter, becoming ashy gray or 

 light brown; in the United States usually shrubby in habit and sometimes only a 

 few feet tall; becoming on the Sierra Madre of Mexico a large tree. Winter- 

 buds ovate to oval, often surrounded by the persistent stipules of the upper leaves, 



about Y long, with thin loosely imbricated light red scales ciliate on the margins. 

 Bark about \' thick, dark or light brown, and covered by small thin closely appressed 

 scales. Wood very heavy, hard, close-grained, dark brown, with thick lighter 

 colored sapwood. 



Distribution. Near the summits of the mountain ranges of southern Arizona, 

 on the San Luis and Animas mountains of southern New Mexico, and southward in 

 Mexico. 



M-HrLeaves dark green. 



45. Quercus dumosa, Nutt. Scrub Oak. 



Leaves oblong, rounded and acute at the apex, broad and abruptly wedge-shaped 

 or rounded at the base, usually about |^' long and ^' broad, spinescent, with few 

 minute teeth, or undulate and entire or coarsely spinescent, with obscure midribs and 

 primary veins, conspicuous reticulate veinlets, and stout petioles rarely i' long; or 

 sometimes oblong to oblong-obovate and divided by deep sinuses into 5-9 oblong 

 acute rounded or emarginate bristle-tipped lobes, the terminal lobe 3-lobed, rounded 

 or acute, 2'-4' long and I'-l^' broad, with primary veins running to the points of the 

 lobes, obscure reticulate veinlets, and petioles sometimes 1' long; thin when they un- 

 fold and clothed with scattered stellate hairs, or rarely tomentose above and coated 

 below and on the petioles with hoary tomentum, at maturity thick and firm, dark 

 green and lustrous on the upper surface, paler and more or less pubescent on the 

 lower surface, mostly deciduous during the winter. FloTvers: staminate in pubes- 

 cent aments; calyx divided into 4-8 ovate lanceolate hairy segments; pistillate ses- 



