Vol.1] Hall. — Botanical Survey of San Jacinto Mountain. 71 



Salix laevigata Behh. Willow. 



A commou willow of the south and west sides in the Transi- 

 tion Zone and below hut confined to the water courses. (Nos. 

 2278, 2510.) 



Salix lasiolepis Benfh. Arroyo Willow. 



Common both along streams and on hillsides on all parts of 

 the mountain up to 9200 ft. alt. The willows are not of much 

 service as zone indicators on account of their great vertical 

 range. The present species ranges from the Upper Sonoran 

 Zone to the Canadian. (Nos. 2350, 2511.) 



BETULACEJ^. 



Alnus rhombifolia Nutt. White Alder. 



Fringes all the lower streams of the west and south sides, 

 reaching an altitude of 6500 ft. in Onstatt and Strawberry 

 valleys. (No. 2521.) 



FAGACE^. 



Castanea sempervirens KelL, Proc. Calif. Acad. i. 75 (1855, 



reprint). Castanopsis chrtjsopliylla, of Bot. Calif., in part, 



not of A. De Candolle. Castawrpsis sempervirens Dudley, in 



Merriam, N. A. Fauna xvi. 142 (1899). Sierra Chinquapin. 



The Chinquapin is the most important shrub of the chaparral 



formation of the boreal region, but is also found in the Upper 



Transition Zone. Its altitudiual range is from 8000 ft. to the 



very summit of the mountain (10,805 ft.). (Nos. 724, 2466.) 



Quercus Californica Ooo^^^r. Q. Kelloggii '^kwb. Black Oak. 



Kellogg Oak. 



Very common in the Transition Zone of the south and west 

 sides, rare in Tahquitz Valley, not seen on the north side; it is 

 thus seen that the Kellogg Oak avoids the desert side of the 

 mountain. 



Quercus chrysolepis Liebm. Live Oak. 



This tree is not rare all around the mountain up to 6000 ft. 



