OAKS OF PACIFIC SLOPE. 169> 



The foliage of this and the preceding species is as striking and beauti- 

 ful as that of any oak in cultivation. 



7. Quercus tomentella. Engelm, 1877. COTTON-LEAF OAK. 



A little-known oak on the Channel Islands of Santa Barbara and the 

 far-distant Guadaloupe Island off the coast of the California peninsula. 

 Found generally in deep, narrow canons, and threatened with extinction. 



Prof. Sargent writes of this oak : "It is possible that this once grew 

 to a large size. The only specimens I saw were on the eastern side 

 of the Santa Catalina Island, south of Avalon, where there is a small 

 grove of stems about 30 feet high, in a circle 11 feet in diameter, evi- 

 dently shoots from a large tree." Discovered 1875, on a bleak crest of 

 Guadaloupe Island, by Dr. Edward Palmer, the distinguished traveler 

 and collector. 



8. Quercus Arizonica. Sargent, 1895. ARIZONA WHITE OAK. 

 This is the most common and widely-distributed white oak of southern 



Arizona and New Mexico, covering, with the Emory oak, the slopes and 

 canons of the mountains up to an elevation of 5,000 to 10,000 feet. Long 

 been confounded with the Eocky Mountain oak, but distinctly separated 

 by its pale bark and shapely head of bright foliage, with large leaves 

 net-veined below. "To this tree," Sargent states, "is due much of the 

 beauty of the forest covering Arizona mountains where the Emory oak 

 is the only broad-leaved tree that exceeds it in abundance." 



9. Quercus Toumeyi. Sargent, 1895. TOUMEY OAK. 



This little oak is the most limited and local of any species in the 

 regions of the Pacific slope. Inhabiting one side of a single moun- 

 tain Mule Mountain, in Cochise County, southeastern Arizona 

 it forms stunted open forests between a belt of the Emory Oak and the 

 summit. The small, ovate, thick leaves, the small fruit, and limited sta- 

 tion serve to distinguish the species. Discovered 1894, by Prof. Tou- 

 rney,* and published with a plate by Prof. Sargent the following year. 



* James Wm. Tourney was born in Van Buren Co.. Michigan, graduated from 

 Michigan Agricultural College 1889, becoming a year later Assistant Professor of 

 Botany in that institution. Appointed Professor of Botany and Entomology in the 

 University of Arizona at Tucson, 1881. Becoming absorbingly interested in the 

 flora of that territory, he has explored carefully certain little-known regions, 

 rewarded by many important discoveries, crowned by this latest and best. He is now 

 in charge of the Forest Tree Cultivation Bureau at Washington, and has issued in- 

 structive bulletins on the subject. 



Lemmon Herbarium, Oakland, Gal., Dec., 1901. 



