672 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



4. Fraxinus greggii A. Gray, Amer. Acad. Arts and Sci. Proc. 12: 63 



1877. 



Near Ruby, Santa Cruz County, 4,000 to 5,000 feet, steep rocky 

 slopes (Goodding in 1936). Western Texas, southern Arizona, and 

 northern Mexico. 



Gregg ash, a handsome shrub or small tree with smooth iron-gray 

 bark and neat foliage. Further study may show the Arizona form 

 to be at least a good variety. The twigs in this form are tomentulose 

 and some of the leaves are 7-foliolate. As compared with specimens 

 of F. greggii from Texas and Mexico, the leaflets are broader and more 

 distinctly crenate, the body of the fruit is thinner, longer, more 

 slender and less obtuse, and the wing extends farther toward the 

 base of the fruit. 



5. Fraxinus velutina Torr. in Emory, Mil. Reconn. 149. 1848. 



Fraxinus standleyi Rehder, Amer. Acad. Arts and Sci. Proc 

 53: 208. 1917. 



Apache County to Coconino County, south to Cochise, Santa 

 Cruz, and Pima Counties, 2,000 to 7,000 feet, along streams, March 

 and April. Western Texas to southern California and northern 

 Mexico. 



Velvet ash, usually a tree, reaching a height of at least 9 m. (30 

 feet), extremely variable. The typical form, with copiously pubescent 

 herbage and leaflets subsessile or very short-stalked, is less common 

 in Arizona than 2 varieties. These are: (1) var. toumeyi (Britton) 

 Rehder (F. toumeyi Britton), similar to the typical form in pubescence 

 but with distinctly stalked leaflets; (2) var. glabra (Thornber) Rehder 

 (F. glabra Thornber), the Arizona ash, with twigs and foliage glabrous 

 or nearly so, the leaflets usually distinctly stalked, often coarsely 

 serrate, occasionally approaching in thickness those of var. coriacea 

 (S. Wats.) Rehder. Both varieties occur throughout the range of 

 the species in Arizona. 



2. FORESTIERA. Adelia 



' Large, much-branched shrubs; leaves simple, opposite or fascicled 

 at the ends of the branchlets; flowers very small, apetalous or nearly 

 so, in lateral clusters ; calyx minute or none ; fruit an ellipsoid or narrow- 

 ly ovoid thin-fleshed drupe with a bony seed. 



The tough wood of F. neomexicana is stated to have been used by 

 the Hopi for making digging sticks. 



Key to the species 



1. Leaf blades with entire or slightly sinuate, more or less involute margins, 

 lanceolate, oblanceolate, or narrowly oblong, not more (commonly less) 

 than 6 mm. wide, usually 3 or more times as long as wide, commonly 

 pubescent; filaments 3 to 5 mm. long, the anthers dark purple; drupes 

 very asymmetric, ellipsoid or subclavate, about twice as long as thick. 



1. F. PHILLYREOIDES. 



1. Leaf blades with crenulate or serrulate margins (rarely nearly entire), ovate, 

 obovate, oblanceolate, or rhombic-elliptic, commonly more than 6 mm. 

 wide, usually not more than twice (exceptionally 3 times) as long as wide; 

 filaments usually not more than 3 mm.- long, the anthers yellow; drupes 

 symmetric or nearly so, ellipsoid or narrowly ovoid, commonly less than 

 twice as long as thick 2. F. neomexicana. 



