MAMMALS OF THE MEXICAN BOUNDARY. 67 



Canyon, on the west side of the San Luis Mountains, at an altitude 

 of about 1,1)70 meters (r),000 feet). The largest was photographed 

 October 2, 1893; three trunks sprang from a common bole, perhaps 

 measuring 9 meters (29 feet) in circumference. The individual 

 trunks measured, respectively, 1 meter above the bole, 3.18 meters 

 (10 feet), 2.51 meters (8.2 feet), and 1.07 meters (3.3 feet) in circum- 

 ference, and the trees were about 20 meters (65 feet) in height. 



Near the Boundary Line, on the west side of the San Luis Moun- 

 tains, at the altitude of 1,920 meters (6,300 feet), I saw a grove of 

 madroilas composed of unusually large trees. .The largest was a 

 double tree having a short trunk measuring 3.5 meters in circum- 

 ference, the forks measuring, respectively, 2.2 and 1.69 meters in cir- 

 cumference; height estimated at 10 to 12 meters (35 to 40 feet). 



ARCTOSTAPHYLOS PUNGENS Humboldt, Bonpland, and Kunth. 



MANZANITA. 



The manzanita is a gnarled and twisted shrub or low tree, having 

 smooth and shiny reddish-brown bark, and berries which in their sea- 

 son are the favorite food of bears, squirrels, and pigeons. It Avas 

 found in the Upper Sonoran and Transition Zones of all the high 

 mountains of the Elevated Central Tract from the San Luis to the 

 Pajaritos (Monuments Nos. 64 to 136). In the Canelo Hills, north- 

 west of the Huachuca Mountains, Arizona, Avas seen an arborescent 

 manzanita 4 meters (15 feet) in height and measuring almost a meter 

 (3 feet) in girth of trunk. 



Other species of Arcto.staphylos were abundant throughout the 

 mountains of the Coast Range in Califoruia. 



BUMELIA RIGIDA (A. Gray) Small. 

 SHITTIMWOOD. 



This is a spiny shrub or small tree of the Sonoran Life Zone, rang- 

 ing from western Texas to Arizona. In aj)pearance it is not uulike 

 Zhyphus. The largest one seen on the San Bernardino River at 

 Monument No. 77 Avas about 8 meters (25 feet) in height. 



BRAYODENDRON TEXANUM (Scheele) Small. {Diospyros icxana Scheele.) 



MEXICAN PERSIMMON. 



The Mexican persimmon AAas abundant in the region surrounding 

 Fort Clark, in Kinney County, Texas. It floAAcrs in April and May. 



FRAXINUS CUSPIDATA Torrey. 

 FRINGE ASH. 



The fringe ash Avas only found by us on the main Hachita peak 

 of the Big Hatchet Mountains, in Grant County, New Mexico. 



