— 250 BOTANY. 
territory. A tree 20-30 feet high, at Willow Spring, Arizona, at an 
altitude of 7,500 feet, Rothrock (252), 1874. 
Var. puncEeNs, Engelm. /. c.; @Q. pungens, Liebm.—Shrubby, leaves 
much smaller, often only 1’ long, of paler color and rigid coriaceous texture, 
spiny-dentate, often somewhat persistent; acorns smaller, mostly elongated, 
with tomentose, scaly, usually less knobby cups. Collected throughout 
Arizona by the different Expeditions. 
Var. opLoneata; Q. oblongifolia, Torr. Bot. Mex. Bound 206, not Bot. 
Sitgr.—Shrub or small tree with small (1-!4’ long), oblong, more or less 
entire, pale, coriaceous leaves, smooth and shining above, searcely reticulate 
below; acorns long-peduncled.—On the Mesa south of Black River, Arizona, 
and in Rocky Cafion, Arizona, Rothrock (292), 1874. A form of this, var. 
grandifolia, Engelm. 1. ¢., with leaves 3-5’ long, and peduncles 2-3’ in length, 
occurs occasionally from Southern Colorado to Arizona. 
Var. grisea, Engelm. /.c.; Q. grisea, Liebm—With similar-shaped, entire 
or irregularly dentate, very thick leaves, often cordate at base, below 
strongly reticulate, and, like the branchlets, yellowish pubescent, with lar- 
ger, subsessile or short-peduncled acorns. A bush or small tree, 20° high.— 
Camp Apache, Dr. Girard, G. K. Gilbert, and at Camp Bowie, Rothrock 
(508), 1874. This form evidently connects with the next species. 
Quercus RETICULATA, H. B K.—A shrubby White Oak, with coarse, 
persistent, short-petioled, obovate leaves, cordate at base, broader and 
obtuse above, repandly spinous-dentate, strongly reticulate, and below, 
together with the branchlets, fulvous-tomentose, sparsely stellate-hairy 
above; fruit-peduncles about half as long as the leaves or shorter, bearing 
one to seyeral acorns in deep, strongly tuberculate cups——On Mount Gra- 
ham, Arizona, at 9,500 feet altitude, Rothrock, 1874 (759). A shrub, 2-4 
feet high, with leaves 2’ long and 14’ wide. It agrees perfectly with the 
Mexican forms, which, however, seem to make large trees, often with larger 
leaves; the leaves of the previous year are found to be persistent even as 
late as September. 
Quercus Emory, Torrey, Bot. Emory’s Exped 1848, 151, t. 9, not of 
Bot. Mex. Bound; Engelm../. c. 382 and 394; Quercus hastata, Liebm.—A 
shrubby or arborescent Black Oak, with rough, black bark, and dark-green 
