356 NOliTII AMERICAN FAUNA. [No. 7. 



1,730 meters (5,700 feet). Another and better defined grove occupies 

 the southeast base of Mount Ma grader, facing the north part of Sareo- 

 batus Flat. 



Gold Mountain. — Tree yuccas occur sparingly in the valley between 

 Mount Magruder and Gold Mountain at an altitude of 1,740 meters (5,700 

 feet) and range thence southerly over the south slope of Gold Mountain 

 and adjacent hills, reaching westward almost to the edge of the north- 

 west arm of Death Valley at 1,770 meters (5,800 feet), and occurring 

 throughout the east and west trough or valley which occupies the north 

 slope of Gold Mountain north of the Gold Mountain mining camp (also 

 known as 'State Line'), reaching as high as 2,100 meters (7,000 feet) on 

 south exposures on spurs aud hills north of the main peak, though not 

 occurring on the north slope of the main ridge proper. On the south 

 side of Gold Mountain they descend to 1,550 meters (5,100 feet), thus 

 reaching well down on the north side of Grapevine Canon. Several 

 were found in flower near the summit of Gold Mountain June 3, the 

 only flowers of this species seen during the trip. They are sessile in 

 dense clumps at the ends of the branches, and are coarser and less at- 

 tractive than those of any of the other species. 



Grapevine Mountains. — A yucca forest of considerable size occupies 

 the east base of the Grapevine Mountains west of the southern half of 

 Sarcobatus Flat. 



Ralston Desert. — A forest of tree yuccas was seen on the north side 

 of the east fork of Amargosa Creek northeast of the north end of 

 Oasis Valley and is probably the northern limit of the species in this 

 direction. 



Table Mountain. — Mr. F. Stephens found a large forest of tree yuccas 

 on the mesa known as 'Table Mountain,' about 40 kilometers (25 miles) 

 north of Ash Meadows. 



Timpahute and Desert Mountains. — Tree yuccas begin on the west 

 side of Timpahute Desert at the very bottom of the east slope of the 

 Timpahute Mountains (altitude 1,450 to 1,490 meters or 4,800 to 4,900 

 feet) and continue all the way to and over the summit of the saddle 

 between the Timpahute and Desert Mountains (summit 1,750 meters 

 or 5,750 feet). They do not occur immediately below Summit Spring, 

 but soon reappear and reach down to Emigrant Valley at 1,580 

 meters (5,200 feet), forming a broad zone along the west slope of the 

 Desert .Range, whence they extend all the way around the south end of 

 Emigrant Valley, and reach several miles north on the west side. Con- 

 tinuing southward without interruption they pass over the low divide 

 at Hungry Hill Summit (1,760 meters or 5,800 feet) and extend down 

 the narrow North Arm of Indian Spring Valley to 1,200 meters (4,000 

 feet), where they are sufficiently abundant most of the way to form a 

 regular yucca forest. In the lower part many trees were in fruit May 

 27, bearing large green pods containing flat seeds. 



