h'26 NORTH AMERICAN FAUNA. [No. 7. 



Pahrump Valley. — Common on the east side of the valley in the 

 Larrea belt. 



Atriplex canescens. 



Atriplex canescens is one of the commonest and most generally dis- 

 tributed greasewoods of the Lower Sonoran Zone. It is abundant 

 from the western arm of the Mohave Desert (Antelope Valley) in 

 California to the foot of the Hurricane Cliffs in western Utah and 

 Arizona. The following notes on its distribution were recorded. 



CALIFORNIA. 



Mohave Desert. — Abundant over most parts of the desert where the 

 soil is alkaline and clayey. It reaches the extreme western end of An- 

 telope Valley near Gorman Station, and occurs in the wash leading 

 thence southerly toward Peru Creek, at an altitude of about 760 meters 

 (2,500 feet). 



Tehachapi Valley. — Tolerably common, coming in from the Mohave 

 Desert through the open canon at Cameron ; seen also in Tehachapi 

 Pass. 



Walker Pass. — Runs up the east side of Walker Pass from the Mo- 

 have Desert to an altitude of about 1,425 meters (4,700 feet). 



Owens Valley. — Common along the bottom and east side of Owens 

 Valley up to about 1,980 meters (6,500 feet) along the west foot of the 

 White and Inyo mountains; abundant in the narrow valley for about 

 9 miles south of Owens Lake. 



Deep Spring Valley. — Grows in the bottom of the valley with Grayia 

 spinosa, Tetradymia spinosa, Menodora spinosa, Dalea polyadenia, 

 D.fremonti, Lycium andersoni, Furotia lanata, and Artemisia spinescens. 



NEVADA. 



Fish Lalce Valley. — Common in the bottom of Fish Lake Valley on the 

 boundary between California and Nevada, and ranges thence up on 

 the northwest slope of Mount Magruder nearly to Pigeon Spring, reach- 

 ing an altitude of 1,980 or 2,010 meters (6,500 or 6,600 feet). 



Sarcobatus Flat. — Common in the northern part of the flat. 



Grapevine Canon. — Found in the bottom of this broad and open canon 

 about a mile or a mile and a half west of Sarcobatus Flat. 



Oasis Valley. — Common, beginning in the canon at the foot of the 

 valley at an altitude of about 1,150 meters (3,750 feet), and growing in 

 company with Atriplex confertifolia, A. parryi, and Sarcobatus vermicu- 

 latus. 



Indian Spring Valley. — Common about the dry lake a little north of 

 the point where the north arm of Indian Spring Valley joins the main 

 valley. 



F migrant Valley. — Common, and ranges thence easterly to the sum- 

 mit of the Desert Mountains near Mud Spring. 



Timpahute Valley. — One of the principal plants; ranges easterly up 

 the west slope of the Pahranagat Mountains to the divide. 



