(208) 



Colorado, where it grows on mesas and hillsides at an alti- 

 tude of 2000-2500 m. It is closely related to J^. Novo-Mexi- 

 cana, differing in the obtuse or rounded lobes of the leaves. 

 As I have seen no mature fruit of J^. Novo-Mexicana, I can 

 not tell if there is any difference in the acorns. There is 

 some indication that the acorn of the latter is shorter than in 

 this species. J^. nitescens differs from J^\ Gunnisonii and J^. 

 Gambclii in the more glossy and deeper lobed leaves and has 

 generally comparatively longer acorns than the former and 

 thicker than the latter. It was figured by Greene in his West 

 American Oaks 2 : pi. jj, and referred by him doubtfully 

 to o^. Gambclii. 



Colorado : Mesas near La Veta, 1900, F. K. Vreeland, 

 677 ( tv P e ) and 6/6; Colorado Springs, 1873, T. C. Porter; 

 Morrison, 1889, E. L. Greene; Ruxton, 1900, Fred Clem- 

 ents (I) ; Cucharas River, above La Veta, 1900, Rydberg 

 & Vreeland, 6jj2 {Jl), 6jjj {fl)\ North Cheyenne Canon, 

 1896, E. A. Bessey (I); Glenwood, 1897, Mrs. Wislizenus 

 (I); Routt Co., 1896, C. F. Baker (I) ; Manitou, 1891, Wm. 

 Trelease; Colorado City, 1871, W. M. Can by ; West Mancos 

 Canon, 1898, Baker, Earle & Tracy, j pi (/) ; Ute Pass, 1895, 

 Mrs. S. L. Clarke; Arkansas, 1845, Fremont, 52; Colorado 

 Springs, 1872, John H. Rcdjield, j;6j ; Bear Creek Canon, 

 1889, E- ■£" Greene; Manitou and Arkansas Canon, 1874, 

 Geo. Engclmann. 



Utah: Ogden, 1871, T. C. Porter {Jl); Spring Lake, 

 1875, C« C. Parry. 



Illustrations: PL 27. jig. 1. Greene, West Am. Oaks, 

 pi- 33 i Sargent, Silva N. Am. pi. j66. 



8. Quercus Novo-Mexicana (A. DC). 



£>uercus Douglasii y Novomexicana A. DC. Prod. 16 2 : 

 24. 1864. 



Quercus alba var. Gunnisonii Wats. King's Rep. 5: 321, 



in part, 1871 ; Port. & Coult. Syn. Fl. Colo. 127, in part. 



1874. 



A .shrub 3-5 m. high. Bark of young branches light 

 brown, or grayish, sparingly puberulent or glabrous ; that of 



