98 
FAGACEAE. 
Acorns ovoid, acute; cup covering about ^ of the acorn. 
7. Q. Gambellii. 
Leaves pale green, more persistent. 
Lobes oblong-ovate, obtuse or acutish, not mucronate. 
8. Q. venustula. 
Lobes triangular-ovate, mucronate. 9. Q. Fendleri. 
Leaves persistent, evergreen, sinuate; lobes or teeth spinulose-tipped or mucronate. 
Leaves decidedly crisped, sinuately lobed; lobes distinctly spinulose-tipped. 
10. Q. pungens. 
Leaves flat, sinuately toothed; teeth mucronate or slightly spinulose-tipped. 
11. Q. undulata. 
1. Quercus utahensis (A. DC.) Rydb. ( Q. stellata Utahensis A. DC.) A 
small tree, often 10 feet or more high, growing in the mountain regions of 
Utah, Colo., Ariz. and N. M.—Alt. 4000-9000 ft.—Chaparral-covered hills 
southeast of Ouray; Hotchkiss, Delta Co.; Trinidad; Glenwood Springs; 
Mancos; North Cheyenne Canon; Wahatoya Canon; hills about Box Canon, 
west of Ouray; Manitou; Mancos Canon; west of Palmer Lake; Glen Eyrie. 
2. Quercus Vreelandii Rydb. A chaparral-forming shrub, 1-1.5 m. high, 
growing on hillsides in Colo, and N. M.—Alt. 4000-9000 ft.—Chaparral-covered 
hills southeast of Ouray; Cerro; Glenwood Springs; butte five miles south¬ 
west of La Veta; South Cheyenne Canon; Colorado Springs. 
3. Quercus leptophylla Rydb. A tree, 10-15 m. high, growing along streams 
in the mountains of Colorado.—Alt. 5500-8500 ft.—Turkey Creek and tribu¬ 
taries; Cucharas River, above La Veta; North Cheyenne Canon; Routt Co.; 
Chicken Creek, West La Plata Mountains. 
4. Quercus Gunnisonii (Torr.) Rydb. A chaparral-forming shrub, 1-3 m. 
high, growing on hillsides and mesas from Colo, to Utah, N. M. and Ariz.— 
Alt. 6000-8000 ft.—North Cheyenne Canon; butte five miles southwest of 
La Veta; Colorado Springs; Cochetopa Pass; Canon of Arkansas; Canon 
City; Durango; hills back of Manitou; Steamboat Springs; Denver. 
5. Quercus nitescens Rydb. A chaparral-forming shrub, 3-5 m. high, grow¬ 
ing on mesas and hillsides, but along streams sometimes forming a small tree; 
in Colo, and eastern Utah.—Alt. 6000-11,000 ft.—Butte five miles southwest 
of La Veta; Glenwood Springs; chaparral-covered hills southeast of Ouray; 
Red Mountain, south of Ouray; hills about Box Canon, west of Ouray; West 
Mancos Canon; Four-Mile Hill, Routt Co.; Los Pinos; Ute Pass, near 
Pike’s Peak; Cheyenne Canon, near Pike’s Peak. 
6. Quercus novomexicana (A. DC.) Rydb. (Q . Douglasii Novomexicana 
A. DC.) A chaparral-forming shrub, 3-5 m. high, or along streams a small 
tree, from Colo, to Utah and N. M.—Alt. 4000-9000 ft.—Glenwood Springs; 
Engelmann Canon; between Pallas and Sydney; Cucharas River, above La 
Veta; Mancos; Manitou; chaparral-covered hills southeast of Ouray; Chey¬ 
enne Mountain; Canon City. 
7. Quercus Gambellii Nutt. A chaparral-forming shrub, 3-5 m. high, grow¬ 
ing on hillsides from Colo, to Utah and N. M.—Alt. 6500-9000 ft.—Chaparral- 
covered hills southeast of Ouray; Cucharas River, above La Veta; Gunnison; 
Twelve-Mile Creek; north of Cheyenne Canon; Manitou; Canon of the 
Arkansas; South Park; Ute Pass; Garden of the Gods. 
8. Quercus venustula Greene. A small shrub, 1-2 m. high, known only 
from the type locality.—Raton Mountains, near Trinidad. 
