:" 



Plate XIII. Figures i and 2. 



QUERCUS GAMBELII, Nuttall. 



Bibliography. 



QuERCUS Gambelii, Nuttall, PI. Gamb., in Journ. Philad. Acad. n. se. i, 179 (1848). 



, Torrey, in Sitgr. Rep. 172 t. 18 (1853); Bot. Mex. Bound. 205 (1853). 



, Cooper, in Smithson. Rep. (1858) 260. 



, Hemsley, Bot. Am. Cent, iii, 171 (1883). 



QuERCUS ALBA GuNNisoNii, Torr., Pacific R. Rep. ii, 130 (1855). 



, Watson, Bot. King. Exp. 321 (1871). 



, Porter, in Hayden's Rep. (1871) 493. 



, Porter & Coult. Fl. Colo. 127 (1874). 



QuERCUS DouGLASii Gambelii, A. DC. Prodr. xvi", 23 (1864). 



Novo-Mexicana, a. DC. loc. cit. 24. 



Quercus stellata Utahensis, a. DC. loc. cit. 22. 



QuERCus UNDULATA GambELIi, Engelm., Trans. St. Louis Acad, iii, 382-392 (1876): 

 Wheeler's Rep. 249 (1878). 



, Sargent, U. S. Forestry Rep. 139 (1884). 



, Coulter, Man. Rocky Mt. Bot. 333 (1885). 



Description. A shrub of six or eight feet high, or tree of from thirty to sixty feet: 

 trunk from a few inches to three feet in diameter, the bark pale and finely or coarsely 

 fissured : leaves glabrous, obovate-oblong, three to five inches long, deeply sinuate-pin- 

 natifid, the lobes oblong, entire acutish or obtuse : fructification annual : acorns sessile, or 

 nearly so ; cup hemispherical, the scales ovate, acute, strongly tuberculate-thickened at 

 base; nut elliptical, barely an inch long, rather obtuse. 



Habitat. In its full development as a shapely, middle-sized forest tree, the species 

 is restricted to the middle and higher elevations of the mountains of southern New Mex- 

 ico and Arizona, and of adjacent Mexico. The shrubby or merely arborescent state, from 

 central Colorado and Utah to the borders of Texas and Mexico, both in the lower moun- 

 tains and, along streams, upon the plains. 



Remarks. This tree, or shrub, is more nearly allied to the common white oak 



