298 NORTH AMERICAN FAUNA, [No.?. 



in southwestern Utah it descends to 1,150 meters (3,800 feet) on the west 

 slope, and to 070 meters (3,200 i'eet) on the east slope, thus reaching the 

 Santa. Clara Valley. 



Rhus diversiloba. 



Common on the west slope of the Sierra Nevada and in the Coast 

 Ranges. It was observed along the road between Walker Basin and 

 Caliente, and also in the Canada de las Uvas. 



Dalea polyadenia. 



This small, glandular, strongly scented, purple-flowered species of 

 Dalea is common over many of the desert valleys of the southern part 

 of the Great Basin, where it was noted in the following localities : 



CALIFORNIA. 



Mohave Desert. — Common in places ; seen in Leach Point Valley. 



Owens Valley. — Common in places in the lower parts of the valley, 

 particularly between Owens Lake and Haway Meadows. 



Deep Spring Valley. — Occurs in company with D. fremonti, Grayia, 

 Menodora, and a few other shrubs. 



NEVADA. 



Fish Lalce Valley. — Tolerably common on the southeast side of the 

 valley and ranging up to an altitude of 1,765 meters (5,800 feet). 



Grapevine Canon. — Tolerably common in the bottom of the canon 

 near Sarcobatus Flat. 



Sarcobatus Flat. — Bather common in places in the northern part of 

 the flat. 



Oasis Valley. — A single bush seen. 



Pahranagat Valley. — Common at the extreme south end of the valley 

 in conrpany with the large blue-flowered species (D. fremonti), and ex- 

 tends thence northerly over the gravel soil and lower gravel slopes u\) 

 to 1,340 or 1,370 meters (4,400-4,500 feet). In full flower May 22-26. 



Great Bend of Colorado River. — Common; in flower May 4. 



Muddy Mountains. — Bather common; in full flower May 5. 



Dalea fremonti. 



The Daleas rank among the most characteristic and, when in flower, 

 among the most beautiful and showy of the desert brush. Some doubt 

 attaches to the determination of the species observed by Mr. Bailey and 

 myself. The large blue-flowered species believed to be Dalea fremonti 

 was noted at the following localities: 



CALIFORNIA. 



Mohave Desert. — Common in places ; noted in Leach Point Valley. 



Owens Valley. — Common along the west side of the valley from Lone 

 Pine to Olancha, and less common south to Haway Meadows. From the 

 east side of Owens Valley it ranges up on the west slope of the White 

 Mountains to 1,980 meters (6,500 feet). 



Deep Spring Valley. — Found in company with D. polyadenia, Grayia, 

 and other bushes of the upper division of the Lower Sonorau Zone. 



