VOL. IV. | Trees of Southern California. 343 
Fls. May-June; Fr. August. Not uncommon in the Cuyamaca 
and San Bernardino Mountains at about 4000 feet altitude. 
Waterman Cafion; Mill Creek; etc. 
Prunus ilictfolia Walp. Cerasus ilicijolia 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, 2 333; Greene Bull. Calif. 
Acad. ii, 395. P. t/ictfolia, var. sepa Brandegee, Proc. Calif. 
Acad. 2d. Ser. i, 209; Zoe, i, iii. P. ilicifolia var. integrifolia 
Sudworth, Gard & For. iv, 51. 
Cercocarpus parvifolius Nutt. Arborescent, 12 feet high, the 
slender stems 4 inches in diameter. Fils. 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. 
Cercocarpus ledifolius 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. 
fleteromeles 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 islands. 
Lyonothamnus flortbundus 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 cafions on Santa Catalina 
Island; endemic, and first collected by Lyoz in July, 1884, in 
flower. 
Cereus giganteus 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. 
Cornus Nuttallii Audubon. Slender tree, 25 feet high, the 
trunk 10 inches in diameter, or often arborescent. Banks of 
