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 glabra te, 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. PI. Aequin. 2: 40. 1809. 



Type locality: "Habitat in montibus aridis Novae Hispaniae [Mexico], inter 

 Guanajuato et Santa Rosa." 



Range : 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. Chenes Amcr. no. 5. pi. S. 1801. 



Quercus acuminata Sarg. Gard. & For. 8: 93. 1895. 



Type locality: Pennsylvania. 



Range: Vermont to Minnesota, Florida, and eastern New Mexico. 



New Mexico: East base of Capitan Mountains (Bai/<// 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 not at hand. He also collected it in the Guadalupe 

 Mountains of Texas near the New Mexico border in 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, hut tin; leaves an- Bomewhat smaller and relatively longer 

 petioled than in plants from farther east. The acorns are aboul t\ pica! a-' to shape, 

 butslightly smaller than those of the eastern tree. 



15. Quercus media Woot. & Standi. Contr. 8. Nat. Serb. 16: L16. L918 

 Tvi'K locality: Glorieta, New Mexico. Type collected bj Wooton, August M, 



1910. 



Ranch:: Northeastern New Mexico. 



