344 Trees of Southern California. [ZOE 
streams in the San Bernardino Mountains, at from 4000 to 5000 
feet altitude. 
Sambucus glauca Nutt. Small tree, 15 feet high, trunk a 
foot in diameter, and hollow, or reduced to a shrub. At lower 
altitudes the leaves are mostly deciduous in summer, starting 
again with early rains in December or January. Fils. April, 
May. Fruit blue or white, and with a white bloom, agreeable, 
July, August. Common on dry soil from about 4000 feet alti- 
tude on the southern slope of the San Bernardino range to the 
Coast, and on the island of Santa Catalina. 
Sambucus Mexicana Presl. Accredited to Southern California 
in the Synoptical Flora, but I have been unable to verify its 
occurrence within the limits of the five southern counties. 
Arbutus Menziesii Pursh. Small tree 15-25 feet high, the 
trunk 4-8 inches in diameter. A single small group among 
oaks, on the Mount Wilson trail, south side of the San Bernar- 
dino range, at 2300 feet altitude. Davidson, McClatchte. 
Fraxinus Oregana Nutt. Small tree 25 feet high, trunk a 
foot in diameter, or more frequently arborescent, 8-15 feet high, 
and growing inthickets. Fl. April; Fr. September. Dry slopes, 
northern base of the San Bernardino Mountains, at 4000 feet 
altitude, Burcham’s Ranch. On the southern slope from 3000 
feet altitude (Lytle Creek; City Creek;) to the San Bernardino 
Valley, goo feet altitude. Also in the San Jacinto Mountains, 
and at Warner’s Hot Springs. 
Chilopsis saligna Don. C. linearis DC., Coville, Death Val- 
ley Rep. 174. Small tree, 20 feet high; trunk 8 inches in 
diameter, or arborescent. Fls. June. Dry washes of the Colo- 
rado and Mojave Deserts, common; also as a shrub at Brookside, 
near Redlands, and in the San Jacinto Valley. 
Umbellularia Californica Nutt. Arborescent, 20 feet high, 
growing in groups, seldom, if ever, a tree. Fls. March. Codm- 
mon along the bottoms of cafions, southern slope of the San 
Bernardino Range at 2000 to 2500 feet altitude. 
Platanus racemosa Nutt. Spreading tree 75 feet high, the 
trunk 4 feetin diameter; in the mountains sometimes arborescent, 
Fis. April; Fr. September. Common near watercourses, from 
