840 



TREES OF NORTH AMERICA 



7 Fraxinus Standleyi Rehd. 



Leaves 5 '-7' long, with a slender glabrous petiole flattened, or slightly concave on 

 the upper side, and 7-9 ovate to oblong-ovate rarely elliptic leaflets, acute or short- 

 acuminate or rarely rounded at apex, broad-cuneate at base, slightly and irregularly ser- 



rate, yellow-green and glabrous above, glaucescent, slightly reticulate, minutely punctu- 

 late, glabrous or slightly villose on the slender midrib below, or rarely closely villose over 

 the entire lower surface, 1^'-2|' long and l'-2' wide, with usually 5-7 primary veins, the 

 terminal leaflet raised on a petiolule up to \' long, the lateral short-petiolulate, or nearly 

 sessile. Flowers not seen. Fruit ripening in September, on slender pedicels, in glabrous 

 panicles 3'-5' long, oblong-obovate, acute, rarely obtuse and occasionally emarginate at 

 apex, surrounded at base by the minute calyx deeply divided into acuminate lobes, f '-1^' 

 long and \'-^ wide, the wing decurrent nearly to the middle of the subterete or slightly 

 compressed ellipsoid or oblong body. 



A tree, sometimes 30 high, usually smaller, with a trunk only a few inches in diameter, 

 and slender terete glabrous branches orange-brown or rarely on vigorous shoots dark red- 

 brown and lustrous. Winter-buds: terminal ovoid, gradually narrowed and acute at 

 apex, \' long. 



Distribution. Mountain canons at altitudes of 5500-8000; Now Mexico (Lincoln, 

 Grant and Luna Counties) ; Arizona (Cochise, Pima and Coconino Counties) ; on the San 

 Jose Mountains, Sonora, at an altitude of 7200; passing into var. lasia Rehd. with branch- 

 lets, lower surface of the 7 leaflets and petioles densely tomentose; in Oak Creek and Syca- 

 more canons south of Flagstaff, Coconino County, at Fort Apache, Navajo County, on the 

 White Mountains, Graham County, and on the Chiricahua Mountains, Cochise County. 

 Arizona; and near Santa Rita, Grant County, New Mexico. A single plant, possibly a 

 shrub, of the Mexican Fraxinus papilosa Ling, differing chiefly from F. Standleyi in the 

 glaucous papillose under surface of the leaves, has been seen at an altitude of 6750 on 

 the west sides of the San Luis Mountains, Grant County, New Mexico. 



