WOOTON AND STANDLEY—-FLORA OF NEW MEXICO, 167 
Acorns barrel-shaped, obtuse; cup 
various. 
Mature leaves thin, large, obovate, 
cuneate, dark green above; acorn 
very short, frequently more than 
half in the cup...........-...-- 21. Q. leptophylla. 
Mature leaves firm, deeply lobed; 
acorns longer, about one-third in 
the cup. 
Leaves oblong, lobed half way to 
the midrib, dull-colored; lobes 
usually simple................22. Q. gunnisonit. 
Leaves obovate, lobed more than 
half way to the midrib, dark 
green above; lobes frequently 
again lobed................-- 23. Q. novomerxicana. 
1. Quercus hypoleuca Engelm. Trans. Acad. St. Louis 3: 384. 1876. 
WHITE-LEAF OAK. 
Type LOCALITY: Arizona. 
Rance: Southwestern New Mexico, southeastern Arizona, and adjacent Mexico. 
New Mexico: Common from the Black Range and the Mogollon Mountains south 
to the Mexican border. Low dry mountains, in the Upper Sonoran Zone. 
One of the two easily recognizable species of the State, occurring only in the moun- 
tains of the southwestern part. It becomesa tree 10 meters high or occasionally higher, 
but is frequently found asa small bush forming clumps. The leavesare characteristic, 
being very thick and leathery, oblong-lanceolate, entire or with a few coarse teeth 
near the apex, yellowish green and glabrous above, densely white-woolly beneath. 
The tree is well worth cultivation for decorative purposes. 
2. Quercus fendleri Liebm. Overs. Dansk. Vid. Selsk. Forh. 1854: 170. 1854. 
FENDLER OAK. 
Quercus undulata A. DC. in DC. Prodr. 16?: 23. 1864, in part. 
Quercus undulata pedunculata A. DC. in DC. Prodr. 167: 23. 1864. 
Quercus undulata Sarg. Silv. N. Amer. 8: 75. 1895, in part. 
Type LOCALITY: New Mexico, probably near SantaFe. Type collected by Fendler 
no. 805). 
Nawen: Southern Colorado, northern New Mexico, and Arizona, and in the Pan- 
handle region of Texas. 
New Mexico: Santa Fe and Las Vegas mountains; Raton; El Rito Creek; Ramah; 
Sandia Mountains; East View; Gallinas Mountains; White and Sacramento mountains; 
Buchanan; Duran. Drier mountains, in the Transition Zone. 
This is very near Quercus undulata, with which it is usually geographically asso- 
ciated, being separated from that species merely by size of the parts and the persistence 
of the leaves. It is practically impossible to distinguish ordinary herbarium speci- 
mens showing leaves and fruit. Doctor Rydberg’s key puts them in two different 
subsections on the ground of persistence of leaves, thus throwing Q. undulata next 
Q. pungens, which has a very different zonal distribution in New Mexico. 
3. Quercus undulata Torr. Ann. Lyc. N. Y. 2: 248. 1828. 
Quercus undulata jamesit Engelm. Trans. Acad. St. Louis 3: 382. 1876. 
Tyre Locauity: ‘‘Sources of the Canadian and the Rocky Mountains,’’ Colorado 
or New Mexico. 
Range: Northern New Mexico and Arizona and southern Colorado, and western 
Texas. 
New Mexico: Glorieta; 25 miles south of Gallup; Pajarito Park; East View; Gallinas 
Mountains; Buchanan; Duran; Guadalupe Mountains; Sierra Grande; Organ Moun- 
tains. Drier mountains, in the Transition Zone, extending down into the Upper 
Sonoran. 
