VOL. IV. J Trees of Southern Califor^tia. 343 



Fls. May-June; Fr. August. Not uncommon in the Cuyamaca 

 and San Bernardino Mountains at about 4000 feet altitude. 

 Waterman Caiion; Mill Creek; etc. 



Prunus ilicifolia Walp. Cerasus ilui folia Nutt. Greene, 1. 

 c. 50. Shrubby, or arborescent and 15 feet high, with trunk 6 

 inches in diameter. Fls. April to June, according to altitude. 

 Fr. red, pulpless, and astringent, October. Common on gravelly- 

 benches and hills from 4000 feet altitude on the southern slope 

 of the San Bernardino range to the Coast. A more tree-like 

 form of Santa Catalina Island, first collected by Lyon, is P. 

 occidentalis, Lyon, Bot., Gaz. xi, 202, 333; Greene Bull. Calif. 

 Acad, ii, 395. P. ilicifolia^ var. ^rc7^/^w/<7//^ Brandegee, Proc. Calif. 

 Acad. 2d. Ser. i, 209; Zoe, i, iii. P. ilicifolia var. iyitegrifolia 

 Sudworth, Gard & For. iv, 51. 



Cercocarpus parvifolius Nutt. Arborescent, 12 feet high, the 

 slender stems 4 inches in diameter. Fls. March; Fr. August. 

 Southern slope of the San Bernardino range as high as 3000 feet 

 altitude, passing along washes far out into the plains; thence 

 throughout the Coast mountains. 



Cercocarptis ledifoliiis Nutt. Small tree, 20 feet high, trunk 

 10 inches in diameter. Abundant on dry ridges on the northern 

 side of the San Bernardino Mountains, at 6000 to 8000 feet alti- 

 tude. Bear Valley; Holcomb Valley. 



Hetero7neles arbutifolia Nutt. Compact shrub, 12 feet high. 

 Fls. June; Fr. December. Common on hillsides from 2500 feet 

 altitude on the southern slope of the San Bernardino Range to 

 the Coast, and on the adjacent inlands. 



Lyonothaimuis floribundiLs Gray, Proc. Am. Acad, xx, 291, 

 Lyon, Bot. Gaz. xi, 333. Brandegee, Zoe i, iii, t. 5. Small 

 tree, growing in groves on the sides of canons on Santa Catalina 

 Island; endemic, and first collected by Lyon in July, 1884, in 

 flower. 



Cereus gigaiiteiis Engelm. Said to occur along the Colo- 

 rado River, (Engelmann, Bot. Calif, ii, 450), but there seems to 

 be no evidence of its presence in the State. 



Cor7ius Niiitallii Audubon. Slender tree, 25 feet high, the 

 trunk 10 inches in diameter, or often arborescent. Banks of 



