178 



58. — [Fraxiniis pistacUvfoJia^ Torrey.) 



A small but rather abuudaut ash occurring aloug streams aod on 

 rocky plains, often growing in the crevices of rocks where there is but 

 little soil. It ranges through southern New Mexico (southern and east- 

 ern Arizona; also in southern >^evada^ in the mountains of westei n 

 Texas, and south into Mexico). Thirty to 40 feet, with a diameter rarely 

 more than 1 foot. The timber is heavy, coarse- grained, and decays rap- 

 idly, but is apparently useful for many of the same purposes as the 

 eastern WbitexVshj sometimes employed for wagon-stock, handles, etc- 



Description. — Leaves compound, witli from 2^ to 3^ pairs of lealiets, the latter vary- 

 ins. much in size and form ; 1 to 4^ inches long, ^ to 2 inches wide, ovate to narrowly 

 lance-shaped ; margin sometimes entire, but chiefly with short, shallow, distant teeth ; 

 smooth above and below, bat latter surface often downy, the veins always more or less 

 so, as also are the young shoots and leaf-stems. Seeds t to 1§ inches long, narrow, 

 -with a spatulate wing at the end, which is rather broadly notched, roanded, or with 

 sharp point; abundant. Branches round. 



50. — Eed Ash. [Fraxlnus 2)ul>escens, Lam.) 



A rather small tree, 30 to -10 feet in height, wich a diameter seldom 

 more than lifeetj very rare in the Eocky Mountain region (being found 

 chiefly in the northern and Atlantic States) ; generally growing along 

 water-courses and in swampy situations. The wood is rather heavy, 

 hard, and strong, but large timber is often brittle and much inferior to 

 that of the White Ash, though occasionally used for the same purposes 

 as the latter. 



J)c8rrij)iiu)t. — Leaves compound with 3^ to 4^ (commonly the former) pairs of leaf- 

 lets, varying in Icngtli iroin 3 to 5 inches, and in width from 1 to nearly 2 inches; 

 ovate to oblong — laiice-shapcd, with rounded base and rather long, thin point ; margin 

 chiefly eutiie. l)rit someriiues with shallow or indistinct teeth; smooth above and 

 woolly beneath : leaf-stems and young shoots rusty-velvety. Seed II to 2 inches long, 

 narrow and pointed at the ba^, broadening into a inirrow wing above \ of an inch or 

 less in width. Freshly parted bark of the branches reddish. 



60. — Green Ash. {Frcuiniis viridis, Michx. f.) 



A middle-sized tree of considerable iujportance on account of its 

 adaptability to various situations, though in its natural state found 

 mostly in rather moist soil of botloms and along streams. It occurs in 

 the eastern Eocky Mountain ranges of Montana, AYahsatch Mountains 

 (in central Utah), and in the ranges of eastern and northern Arizona 

 (eastward it is found along the Atlantic coast and north of the United 

 States boundary). Forty to GO feet in height and 1 to ] J feet in dianieter. 

 The wood is heavy, hard, and strong, often coarse-grained, and although 

 generally inferior in quality to that of the White xish, it is used as a 

 substitute for the latter. 



Des.criplion. — Leaves compound, with 2^ to 4i pairs of leaflets, which are 2 to 5^ 

 inches long and from to V± inches wide ; ovate, obloug-ovatc to lance-shaped, often 

 vvith long tapering point, sometiiues rather wedge-shax^ed or rounded at the base* 



