344 Trees nf Southern California. [zoe 



streams in the San Bernardino Mountains, at from 4000 to 5000 

 feet altitude. 



Sambiicus 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. Fls. 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, 



SambucHs 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, McClatcliie. 



Fraxinus Orcgaiia Nutt. Small tree 25 feet high, trunk a 

 foot in diameter, or more frequently arborescent, 8-15 feet high, 

 and growing in thickets. 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, 900 feet altitude. Also in the San Jacinto Mountains, 

 and at Warner's Hot Springs. 



Cliitopsis 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. Com- 

 mon along the bottoms of canons, southern slope of the San 

 Bernardino Range at 2000 to 2500 feet altitude. 



Platanus racemosa Nutt. Spreading tree 75 feet high, the 

 trunk 4 feet in diameter; in the mountains sometimes arborescent, 

 Fls. April; Fr. September. Common near watercourses, from 



