MAMMALS OF THE MEXICAN BOUNDARY. 63 



KCEBERLINIA SPINOSA Zuccarini. 

 KCEBERLINIA; JUNCO. 



An intricate spiny shrub growing- in sandy jjlaces along the Rio 

 Grande of Texas and west to Tucson, Arizona. 



FREMONTODENDRON CALIFORNICUM (Torrey) Coville. 

 FREMONT TREE; FREMONTIA. 



This tree was found in the Jamul Valley, between YA Nido and 

 Dulznra, California. 



RHUS INTEGRIFOLIA (Nuttall) Bentham and Hooker. 

 WESTERN SUMACH. 



This, the only arborescent species of sumach seen by us on the 

 Mexican Line, was found at Point Loma, San Diego County, Cali- 

 fornia. 



ACER SACCHARUM GRANDIDENTATUM (Nuttall) Sudworth. 

 LARGETOOTH MAPLE. 



This is the hard maple of the Mexican Border region. T also 

 saw it in the Mogollon Mountains, of central Arizona, where the 

 leaves turned red in October. Usually it is a small tree in ravines 

 or canyons of the mountains; but in Turkey Canyon, in the San Luis 

 Mountains, near Monument No. GG of the Mexican Boundary Line, a 

 tree was found which measured 2.25 meters (7.4 feet) in circumfer- 

 ence 1 meter aboA'(^ the ground, the trunk continuing about the same 

 size for G meters (20 feet), then dividing into three nearly equal 

 branches. This tree was estimated to be about 18 meters (59 feet) 

 in height.'' Several trees of this S2)ecies in the neighborhood approach 

 this one in height. It was common at about 1,970 meters (G,000 feet) 

 altitude on the San Luis, San Jose, and Huachuca mountains. 



ACER NEGUNDO Linnaeus. 

 BOXELDER. 



The boxekler was found on the San Jose Mountains, State of 

 Sonora, Mexico, and on the Huachuca Mountains and the Verde 

 Eiver, in Arizona, ranging in altitude from 1,00G meters or 3,300 feet 

 (in the Verde Valley) to 2,085 meters or G,840 feet (canyon on north 

 side of the San Jose Mountains) . 



UNGNADIA SPECIOSA Endlicher. 

 TEXAS BUCKEYE; MEXICAN BUCKEYE. 



This is a very small tree, found in the vicinity of Fort Clark, 

 Kinney County, Texas. The seeds or " beans " are similar to chest- 

 nuts, but poisonous. 



" A photograph of this tree is reproduced and faces page 1.5 of the Report of 

 the Boundary Commission, 1898. 



