MAMMALS OF THE MEXICAN BOUNDARY. 43 



seen by us in the San Luis Mountains, in the lower part of Turkey- 

 Canyon, measured 2.75 meters (9 feet) in circumference and 18 

 meters (60 feet) in height. 



There are some particularly fine examples of the alligator juniper 

 in canyons on the north side of the San Jose Mountains in Sonora, 

 south of Monument No. 93 of the Mexican Boundary Line. The 

 largest of these, growing at 2,077 meters (6,815 feet) altitude, meas- 

 ured 4.5 meters (15 feet) in circumference and about 18 irieters (60 

 feet) in height. 



On the Patagonia Mountains the alligator juniper ranges from 

 the edge of the Santa Cruz River, at the Mexican town of Santa 

 Cruz (altitude 1,355 meters, or 4,4'46 feet), up to the summit {2,217 

 meters, or 7,274 feet) . 



Birds and squirrels, especially the chipmunk, are fond of the fruit 

 of this tree. 



NEOWASHINGTONIA FILAMENTOSA (Wendland) Sudworth. 

 FANLEAF PALM; DESERT PALM. 



This, the largest of the palms of the United States, forms isolated 

 groves along the western border of the Colorado Desert, in southern 

 and Lower California, extending well up into many of the moist 

 canyons at the eastern base of the Coast Range Mountains. The 

 " Palm Tract '' marks the extension of the Lower Californian trop- 

 ical flora into the United States. 



YUCCA TRECULEANA Carriere. 

 TEXAS SPANISH BAYONET. 



This coarse, long-leaved yucca was only observed about Las Moras 

 Mountain, and in other parts of Kinney County, Texas. 



YUCCA BREVIFOLIA Torrey. 

 SOHOTT YUCCA. 



This species was found in canyons of the mountains of southern 

 New Mexico and Arizona, and the northern part of Chihuahua and 

 Sonora. It was found from the lower timber line to the summit of 

 the San Luis Mountains, and in all the canyons at the head of the 

 Yaqui River in the vicinity of the Boundary. Specimens were col- 

 lected in the Huachuca Mountains, Arizona ; and it also occurs in the 

 San Jose Mountains, Sonora. The large fruit is edible. 



YUCCA RADIOSA Trelease. ( Yucca conslrida Buckley.) 



DESEKT YUCCA. 



This tall, branching yucca was the only tree of the deserts between 

 the Rio Grande and the San Luis Mountains. In the 50-mile desert 

 west of El Paso open forests of this species spread over large areas 



