Mat, 1893.] SHRUBS OF THE DEATH VALLEY EXPEDITION. 359 



(or highest) side of the valley to the ealion separating Indian Spring 

 Valley from the Amargosa country, and occurs scattering on the west 

 or Amargosa side, skirting the higher slopes. In the north arm of 

 Indian Spring Valley it is common and conspicuous, ranging from 

 1,370 meters (4,500 feet) northward to about 1,670 meters (5,500 feet). 

 It was not found on the Beaverdam Mountains or in any other locality. 



ARIZONA. 



Detrital Valley. — Mr. Vernon Bailey informs me that he found this 

 species abundant and of unusually large size throughout the south end 

 of Detrital Valley and north end of Sacramento Valley, covering the 

 divide and extending for some distance along the foothills of the border- 

 ing mountains. 



Yucca whipplei. 



This is the characteristic yucca of the Coast Ranges of California, 

 whence it extends easterly along the west slope of the Sierra Nevada, 

 where we found it flowering abundantly between Kernville and Walker 

 Basin June 23, its creamy flo wers on tall white stalks dotting the side- 

 hills above the chaparral. It is common also in the Tehachapi Moun- 

 tains, ranging down as low as 1,060 meters (3,500 feet) in the upper 

 part of the canon leading from Tehachapi to Mohave, and on the hills 

 at the head of Antelope Valley, near Gorman's ranch (altitude about 

 1,150 meters or 3,850 feet), whence it spreads over the Sierra Liebre 

 range. 



Agave utahensis. 



This species, the only true agave met with by the expedition, was 

 found in but two localities, namely, the Charleston Mountains in 

 Nevada and the Beaverdam Mountains in southwestern Utah. In the 

 former locality it was common on rocky hillsides in the neighborhood 

 of Mountain Spring, from an altitude of 1,600 meters (5,300 feet) up to 

 1,830 meters (6,000 feet), where many 'mescal' pits were found where the 

 Indians had baked the edible butts of the plants. These pits average 

 a little more than a meter (about 4 feet) in depth, and from 3£ to 6 

 meters (12 to 20 feet) in diameter. On the west slope of the Beaverdam 

 Mountains in Utah the agave begins at 1,180 meters (3,800 feet) and 

 grows in a narrow zone upward toward the summit of the pass. 



