Plate VI. 



QUERCUS HYPOLEUCA, Engelinann. 



Bibliography. 



QuERCus CONFERTIFOLIA, Torr., Mex. Bound. 207 (1858) ; not of HBK. 



, Cooper, in Smithsonian Rep. (1858), 261. 



QuERCUS HYPOLEUCA, Engelm., Trans. St. Louis Acad, iii, 384 (1876). 



, Engelm., Bot. Wheeler's Exp. 251 (1878). 



, Sargent, U. S. Forestry Rep. 154 (1884). 



Description. A small rather compact and shapely tree, thirty feet high, more or 

 less, the trunk often a foot or two in diameter, the bark rough and black: leaves coriace- 

 ous, lanceolate, short-petioled, entire and with revolute margins or with a few teeth, dark 

 green and lustrous above, densely white-tomentose beneath : fructification annual : acorns 

 sessile or short-peduncled ; cup hemispherical, the scales ovate-triangular, obtuse; nut 

 ovate-oblong, well exserted. 



Habitat. Mountain districts of southern New Mexico and Arizona; also in adjacent 

 Mexico. 



Remarks. This is a neat and ornamental small tree, the contrast between the dark 

 green of the upper, and the white-woolliness of the lower surface of the leaves, being agree- 

 able to the eye. The species does not form groves or thickets. The individuals are mostly 

 somewhat isolated, and find their best development among cliffs, well up in the 

 mountains. The parts of the country where it grows are yet scarcely settled, and nothing 

 is known as to the possible economic value of the tree. Dr. Kellogg's is, I believe, the 

 first published figure of the species. 



