Vol. n Hall. — Botanical Survey of San Jacinto Mountain. 85 



ROSACE.^. 



Adenostoma fasciculatum H. d- A. Cliamisal. 



This, the priucipal shrub of the chaparral belt, sometimes 

 reaches an altitude of 7500 ft. on exposed south slopes. It is 

 present, surrounded by Transition elements, on all the "Sonoran 

 islands," described on page 37. 



Adenostoma sparsifolium Torr. Bastard Cedar. Yerba del 



Pasmo. 



Abundant on Chalk Hill and elsewhere in the Upper Sonoran 

 Zone on the south and east sides. (Nos. 776, 2638.) 



Amelanchier alnifolia Nutt. Service Berry. 



Strawberry Valley ; Tahquitz Valley; near Kenworthy. (No. 

 2422.) 



Cercocarpus betulaefolius Hool-. C. parHfolius glaher Wats. 



Mountain Mahogany. 



Common in the foot-hills, and occasionally found beneath 

 pines, but only on the south and west sides. 



Cercocarpus ledifolius Nutt. 



This is a shrub of higher altitudes, being common on ridges 

 above the 7500-foot contour. Near Round Valley it sometimes 

 becomes arboreous with trunks 2 ft. in diameter. It is adapted 

 to the xerophytic conditions prevailing on these ridges by its 

 tough branches and small, leathery leaves. (Nos. 853, 2584.) 



Fragaria Californica C. d; S. Wild Strawberry. 



The Strawberry is frequently met with in the lower part of 

 the pine belt, but not on the east side. (No. 861.) 



Holodiscus discolor dumosa (Nntt.) Maxim. Spircea dumosa 



Nutt., T. & G., Fl. i. 416 (1840) as synonym; Wats., Bot. 



King 80 (1871). S. ariafolia discolor T. & G., Fl. i. 416 



( 1840 ) . Dwarf Meadow Sweet . 



Occasional along ridges at 7500-10,800 ft. alt., from Tahquitz 

 Peak and Lake Surprise to San Jacinto Peak, where it was found 

 growing among the summit rocks. 



The specimens on the summit (no. 796) are less than 2 ft. 

 high with leaves mostly under 4 lines in length, while the nearly 



