May, 1893.] SHRUBS OF THE DEATH VALLEY EXPEDITION. 325 



Virgin and Loiver Muddy Valleys. — Common on the dry bottoms. 



UTAH. 



Santa Clara Valley. — Common in places in the lower valley. 



Atriplex parryi. 



This species apparently has the most restricted range of any of the 

 shrubby forms of the genus. In California it was found in parts of 

 Owens Valley between Big Pine and Lone Pine, and also along the 

 west side of Owens Lake. In Ash Meadows, on the boundary between 

 California and Nevada, it is one of the commonest bushes, covering 

 the alkali Hats and reaching north to the gravel Larrea plain that 

 marks the beginning of the Amargosa Desert proper, where it ends 

 abruptly because the soil is unsuitable. It reappears in Oasis Valley 

 (beginning in the canon at the foot of the valley at an altitude of 1,140 

 meters or 3,750 feet) where it extends all- the way along the bottom, asso- 

 ciated with Atriplex confertifolia, A. canescens, and Sarcobatus vermicula- 

 ttis. A little was found at the bottom of Grapevine Canon about a 

 mile and a half from its east mouth, whence it extends easterly over 

 the north part of Sarcobatus Flat, where, however, it is not abundant. 

 Atriplex hyrnenelytra. 



This striking species, which grows on salty and alkaline soil in the 

 Lower Sonoran zone, is not widely distributed over the deserts of 

 southern California and Nevada. It is common in Death Valley, 

 Panamint Valley, and Ash Meadows, and also in places in the Muddy 

 and Virgin valleys in eastern Nevada, but was not found in Oasis 

 Valley or in any of the other valleys of southern Nevada. 



Atriplex polycarpa. 



Of all the greasewoods, Atriplex polycarpa is the most distinctive of 

 the lower division of the Lower Sonoran Zone, occupying the bottoms 

 of the lowest deserts, and never occurring above, if as high as, the upper 

 edge of the Larrea. 



CALIFORNIA. 



Mohave Desert. — Common in suitable bottoms; the principal brush on 

 the clay flat a few miles west of Willow Spring, in Antelope Valley. 



Owens Valley. — One of the commonest shrubs in the lower part of the 

 valley from Lone Pine south to Haway Meadows (about 16 kilometers, 

 or 10 miles, south of Owens Lake). 



NEVADA. 



Grapevine Canon. — Grows in the bottom of the canon about a mile 

 and a half from Sarcobatus Plat. 



Oasis Valley. — Common in the lower part of the valley. 



Pahranagat Valley. — Not found in Pahranagat Valley proper, but 

 common on the flat south of Pahranagat Lake at an altitude of about 

 1,070 meters (3,500 feet). 



Virgin and Loiver Muddy valleys. — Common on dry bottoms. 



