296 NORTH AMERICAN FAUNA. [No. 7. 



ARIZONA. 



Beaver dam Mountains. — Larrea is abundant in the Virgin Valley near 

 the mouth of Beaverdam Creek in northwestern Arizona, and reaches 

 up on the west slope of the Beaverdam Mountains to 1,160 meters (3,800 

 feet). 



UTAH. 



Santa Clara Valley. — Larrea finds the extreme northeastern limit of 

 its range in the Lower Santa Clara or St. George Valley in southwestern 

 Utah, where it forms a sparse growth on gravel soils and disappears on 

 southerly exposures on the north side of the valley at an altitude of 

 1,200 to 1,280 meters (4,000 to 4,200 feet). 



Thamnosma montana. 



This stinking bush, of a yellowish-green color and generally sprinkled 

 with berry -like fruit about the size of peas, was common in many of 

 the southern deserts traversed. It was noted in the following locali- 

 ties: 



CALIFORNIA. 



Mohave Desert. — Common in places. 

 Leacli Point Valley. — Found sparingly. 



NEVADA. 



Charleston Mountains. — Common on the Charleston Mountains, 

 where it ranges on the west slope from about 1,340 to 1,825 meters 

 (4,400 to 6,000 feet). On the east slope it descends to 1,219 meters 

 (4,000 feet) with Coleogyne. 



Indian Spring Valley. — A few plants seen. 



Valley of the Virgin and Loicer Muddy. — Occurs sparingly. 



ARIZONA. 



Virgin Valley. — Found on the east side of the Virgin Valley near the 

 mouth of Beaverdam Creek, whence it ranges up to 1,340 meters (4,400 

 feet) on the west slope of the Beaverdam Mountains. 



UTAH. 



Santa Clara Valley. — Occurs along the foot of the Beaverdam Moun- 

 tains, ranging from 1,090 to 2,130 meters (3,000 to 4,300 feet). 



Mortonia scabrella. 



This bush was found by Mr. Bailey and myself on a limestone knoll 

 in the valley of the Muddy, near Overton, Nev., May 6. It is re- 

 markable for the peculiarity of its leaves, which are oval, conspicuously 

 granular, and have thick margins that at first sight seem to be everted. 



Glossapetalon nevadense. 



This small bush was collected on the Pahroc Mountains near Pahroc 

 Spring, Nevada, and a species supposed to be the same was found on 

 the Beaverdam Mountains in southwestern Utah. 



