40 University of California Publications in Zoology. (Vou. 5 
yellow pines. The high ridges east of Sugarloaf, from 7500 to 
9000 feet altitude, were in places covered almost purely with 
mountain mahogany, some examples being very large. The same 
plant was abundant around Gold mountain, and the eastern end 
of Holeomb valley. I saw small groups and solitary trees along 
the upper Santa Ana down to 6000 feet altitude, though not so 
thrifty as those farther towards the desert. As an exception, 
there was a grove of quite large trees in the lower Fish creek 
canon, 6600 feet altitude. (See pl. 13z.) 
Fragaria californica Chamisso & Schlechtendal. 
Strawberries were plentiful alone streams in the Transition 
zone. Beds of large extent were found in Lost creek canon, 6600 
feet altitude; also along Fish ereek and South Fork, where ber- 
ries were ripening from July 15 into August. 
Potentilla Wheeleri Watson. 
Taken on the summit of San Gorgonio peak, 11,450 feet, July 
16, 1906; named by Miss Eastwood. 
Rubus parviflorus Nuttall. 
The thimbleberry was an abundant plant in damp and shaded 
canons from the head of Mountain Home canon eastward to the 
South Fork of the Santa Ana, 5000 to 8000 feet altitude. Fruits 
were ripe in August. * 
Rosa californica glabrata Parish. 
The wild rose was widely distributed near water up to an 
altitude of 8000 feet in places. Most conspicuous in dense low 
thickets along the upper Santa Ana from 6200 to 6700 feet alti- 
tude; also around a cienaga at the north base of Sugarloaf, 7500 
feet. 
Prunus demissa (Nuttall) Walpers. 
Extensive thickets of the chokecherry were noted in the upper 
part of the brush belt between lower Bear ereek and Clarke 
ranch. We found the abundant and agreeable fruit ripening 
there, September 4, 1905. 
