WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 171 
open canyons of the mountains, associated with junipers and pinyon. The leaves 
are exceedingly variable in form, from oblong-elliptic, flat, and entire to sinuate- 
dentate with the large teeth more or less spine-tipped and decidedly crisped. The 
texture is always subcoriaceous, and the living leaves are bluish green (never chlo- 
rophyll green) above and glabrate, not shining, duller and stellate-pubescent beneath, 
with prominent veins. The leaf approximates typical Q. pungens on the one side 
and Q. reticulata on the other. The leaves of Q. arizonica and Q. grisea are hardly 
distinguishable, although those of the latter are usually smaller and less sinuate- 
dentate. The acorns are noticeably different: In Q. arizonica the cup is shallow and 
covers only the lower fifth of the rather slender acute acorn, while the acorn of 
Q. grisea is barrel-shaped, shorter, and almost truncate, the cup covering fully one- 
third of the acorn, and the scales being much more noticeably corky-thickened. 
Quercus arizonica X< grisea. 
At Van Pattens Camp in the Organ Mountains there is a single tree, growing with 
others of Q. grisea and Q. arizonica, which it is impossible to distinguish from the 
latter by vegetative characters, but the acorn of which is very peculiar. It is of the 
general barrel shape of Q. grisea and truncate, but is as long as the largest Q. arizonica, 
and the cup is deeper than in either of the species and twice as much thickened. It 
was impossible to find more than the one tree with this kind of fruit in the region, 
although the two species are common there. 
13. Quercus reticulata Humb. & Bonpl. Pl. Aequin. 2: 40. 1809. 
Type LocaLity: ‘‘Habitat in montibus aridis Novae Hispaniae [Mexico], inter 
Guanajuato et Santa Rosa.” 
Rance: Mountains of extreme southwestern New Mexico, southeastern Arizona, and 
northern Mexico. 
New Mexico: Florida Mountains; Animas Mountains; San Luis Mountains; Mogo- 
llon Mountains. Lower and Upper Sonoran zones. 
This species is a large tree in Mexico, but in our range is a straggling bush only a 
few meters high. It is somewhat closely related to Q. arizonica, but typical leaves 
are considerably larger, obovate, merely repand-dentate with rather small teeth, and 
strongly reticulate. They are dull green above and paler beneath, and the veins 
below are covered with yellowish brown pubescence. 
14. Quercus muhlenbergii Engelm. Trans. Acad. St. Louis 3: 391. 1877. 
CHESTNUT OAK. 
Quercus prinus acuminata Michx. Hist. Chénes Amer. no. 5. pl. 8. 1801. 
Quercus acuminata Sarg. Gard. & For. 8: 93. 1895. 
Tyre LocALity: Pennsylvania. 
Rance: Vermont to Minnesota, Florida, and eastern New Mexico. 
New Mexico: East base of Capitan Mountains (Batley 141). Upper Sonoran or 
lower part of the Transition Zone. 
Mr. Vernon Bailey says this plant is common on Coyote Creek near Guadalupita, 
but specimens collected there are notathand. He also collected it in the Guadalupe 
Mountains of Texas near the New Mexico borderin 1901. These three stations extend 
the range of the species some hundreds of miles westward and add another type of 
oak to those of our State. The material corresponds very well with specimens from 
Kansas and Arkansas, but the leaves are somewhat smaller and relatively longer 
petioled than in plants from farther east. The acorns are about typical as to shape, 
but slightly smaller than those of the eastern tree. 
15. Quercus media Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 116. 1913. 
Tyre Locauity: Glorieta, New Mexico. Type collected by Wooton, August 24, 
1910. 
Rana@e: Northeastern New Mexico. 
