324 NORTH AMERICAN FAUNA. [No. 7. 



Plains of Idaho southward, and reaches downward into the Lower So- 

 noran also. 



CALIFORNIA. 



Mohave Desert. — Common in suitable parts of the desert, and found 

 as far west as a point a little north of Willow Spring, in Antelox>e 

 Valley. 



Owens Valley. — The commonest plant throughout a large part of 

 Owens Valley, predominating over all other species 5 particularly abun- 

 dant on suitable soil from Big Pine southward to a point 9 miles south 

 of Owens Lake. On the east side of the valley it reaches up on the 

 White and Inyo mountains to about 1,980 meters (6,500 feet) in the 

 latitude of Big Pine. 



NEVADA. 



Fish Lake Valley. — Very abundant, and ranging thence up on the 

 northwest slope of Mount Magruder in the wash leading to Pigeon 

 Spring as high as 1,950 meters (6,400 feet), where it grows in company 

 with Sarcobatus vermieulatus and Stanley a pinnata. 



Valley between Mount Magruder and Gold Mountain. — Common, and 

 mixed with Artemisia tridentata, Grayia spinosa, Tetradymia glabrata. 

 and other species. 



Grapevine Carlo n. — Abundan t. 



Sarcobatus Flat. — The southern half of Sarcobatus Flat is covered 

 with this species, very pure and free from admixture with other plants. 

 To the north it becomes invaded by Atriplex parryi, A. canescens, Arte- 

 misia spinescens, Tetradymia glabrata, Grayia spinosa, and several other 

 shrubs. 



Oasis Valley. — Common throughout the valley, but disappearing 

 abruptly at the south end, and not seen on the Amargosa Desert. 



Ash Meadows. — The commonest plant on the dry, alkali soil, stopping 

 with the alkali flat at the south end of the Amargosa Desert proper. 



Indian Spring Valley. — Common about the large dry lake at the 

 junction of the north arm with the main valley. 



Emigrant Valley. — One of the commonest plants in the bottom at an 

 altitude of a little more than 1,525 meters (5,000 feet) and extending 

 thence easterly up the west slope of the Desert Bange to 1,675 meters 

 (5,500 feet) or higher. 



Timpahute Desert. — One of the principal plants. 



Pahranagat Valley. — Abundant in large patches on the bottoms and 

 lower gravel slopes, and in the lower part of the wash coming into 

 Pahranagat Valley from Pahroc Plain; ranges up on the west side of 

 the valley to 1,430 meters (4,700 feet). 



Desert Valley. — Common in the flat bordering the dry lake. 



Meadow Greek Valley. — Abundant in the flat along the creek. 



Pahrump Valley. — Very abundant on the flats in the bottom of the 

 valley. 



