VOL. IV.] Trees of Southern California. 347 



Fls. June. Bear Valley; San Jacinto Mountains; San Antonio 

 Mountain. 



Alnvs rhombifolia Nutt. Parry, Bull. Cal. Acad, ii, 351. 

 A. oblongifolia Torr. Slender tree, 50 feet high, the trunk 2 feet 

 in diameter. Fls. January. Abundant along streams from 3000 

 feet altitude on the southern slope of the San Bernardino Range 

 to the Coast. San Jacinto Mountains; Cuj'amaca Mountains. 

 Santa Monica, Hasse. 



Salix nigra L. Fort Mojave, the station noted for this willow 

 in the Botany of California, is in Arizona, but it may be expected 

 on the Californian side of the Colorado. Mr. Bebb informs me 

 that there is in his herbarium a specimen of the subvar. venulosa 

 Anders., a pubescent foim of the var. longipes, Anders., collected 

 by Dr. J. T. Rothrock at Elizabeth Lake, No. 187, Survey of 

 the looth Meridian. I have be§n able to find no other evidence 

 of the existence of this tree within our limits. 



Salix Icevigata Bebb. " Black Willow." The largest of the 

 Southern California willows, 25 feet high, the trunk 18 inches in 

 diameter, or infrequently shrubby. Fls. April. By streams or 

 in meadows; common from 2000 feet altitiide on the southern 

 slope of the San Bernardino Range to the Coast, and on Santa 

 Catalina Island. 



Salix lasiandra Benth., var. lancifolia Bebb. Rarely a small 

 tree, 20 feet high, the trunk 10 inches in diameter; usually- 

 reduced to a shrub. Fls. May. Situation and continental range 

 of the last species. 



Salix lofigifolia M.nh\. Reduced to a shrub. Sandy banks of 

 streams, away from the water. Borders of the Colorado Desert, 

 at Agua Caliente (Palm Springs), also at Lytle Creek near San 

 Bernardino. This wide-spread species probably has a more 

 extended range in this region than here indicated, but material 

 and records are wanting for its definition. It is with difiiculty 

 distinguished from some forms of S. sessilifolia Nult., a very 

 common and very variable willow of the region. 



Salix flavescens Nutt. Reduced to an arborescent shrub, 

 12 feet high. Fls. June. Stream banks in the San Bernardino 

 Mountains at from 7000 to 8000 feet altitude. 



