20G REHDER. 



the terminal leaflet equals those of the upper pair. The pubescence 

 of the branches and the leaves is very short and rather thin ; the fruits 

 are 2-2.2 cm. long with a linear-oblong wing 3-4 mm. broad. The 

 specimens I have referred to this variety show great variation in 

 pubescence, in the shape and size of the leaflets, in the length of the 

 petiolule and also in the fruits; many specimens are intermediate 

 between the type and this variety and sometimes the leaves of weaker 

 branchlets and those at the base of the vigorous shoots resemble 

 those of typical /'. vclutina, while the upper leaves of vigorous shoots 

 are those of var. Toumciji. The fruits vary from 1.5-3.5 cm. in length 

 with the wing usually narrowly oblong and from 3 to 4 mm. broad, 

 sometimes the wing is spatulate and up to 5 mm. broad, of this the 

 most extreme form is my No. 512 which has the spatulate wing 5 mm. 

 l)road and the whole fruit only 1.5-2 cm. long with the body of the 

 fruit 0.8-1.2 cm. long. 



This variety is the most common form in Arizona, while in New 

 Mexico the type seems to be more widely distributed. 



1 have not taken up the name attenuata for this variety, though it 

 is the oldest, because the two specimens cited by Jones under his /'. 

 nttcnuata, belong to different species or at least different forms, and 

 none of them being designated as the type and the description ap- 

 parently based on both, it' remains uncertain which ought to be con- 

 sidered the type. 



Fraxinus velutina var. coriacea, n. comb. 



Fraxinus coriacea S. Watson in Am. Nat. VII. 302 (in part) 



(1873), exclud. planta coll. a Bigelow.^ — Rothrock in Rep. U. S. 



Gcog. Surv. tvest 100th merid. VI. 185, t. 22 (1878).— Coville 



in Co7itrih. U. S. Nat. Herb IV. 148 (Bot. Death Valley Exped.) 



(1892). 

 Fraxinus pistaciaefolia var. coriacea Gray, Syn. Fl. X. Am. II. 



pt. 1, 74 (1878). 

 Fraxinus americana var. coriacea Wenzig in Bot. Jahrb. IV. 182 



(1883).— Wesmael in Bull. Soc. Bot. Belg. XXXI. 108 (1892). 



Nevada. "Ash Meadows," 1871, G. M. Wheeler (type). 

 Utah. St. George, 1875, E. Palmer, 1898, ,/. W. Carpenter. 

 California. Inyo Co.: Owens Lake near Olancha, June 5, 

 190G, Hall & Chandler (No. 7328, and probably No. 7322). 



2 liigclow's specimen from Devil's Run Canyon, western Texas, is F. 

 le:vensis Sargent. 



