650 PROCEEDINGS OF THE AMERICAN ACADEMY 



549. — Nevada, in the Pah-Ute Mountains, Ruby Valley, etc., alt. 

 5,000 to 6,000 feet, S. Watson. Pahranagat Mountains, Southeastern 

 Nevada, Miss Searls. 



E. canum Gray, PL Fendl., is well marked by its perfectly glabrous, 

 narrow, conspicuously about 10-ribbed akenes. The pubescence, which 

 is seldom as silvery as in the preceding, is somewhat strigose, and on 

 the involucre loose or hirsute ; the heads only half as large as those of 

 E. argentatum ; the rays narrower ; style-appendages equally short and 

 obtuse. This species proves to be more abundant than was supposed, 

 I having confounded it with E. ccespitosum. New Mexico, Fendler, 

 375 ; Parry, 83 and 88 of coll. 1867. Wyoming, on the Platte, 

 Geyer, 30, in part (the rest being E. pumilum). Colorado Territory, 

 Hall and Harbour, no. 244, wrongly referred to E. ccespitosum. 



E. stenophyllum Gray, in Bot. Whippl. p. 42 (98), from New 

 Mexico, Dr. Bigelow, has achenia villous with long soft hairs and only 

 marginal nerves, obtuse style-appendages, and a very copious simple 

 pappus. The proper tube of the corolla in the di?k is very short, the 

 cylindrical throat sparsely villous. 



Var. ? tetrapleurtjm has smaller heads and flowers, and mostly 

 4-nerved, rarely 2 - 3-nerved ovaries. The plant is more canescent, 

 and the stems fork once or twice. It lies between E. stenophyllum and 

 E. filifolium. — Southern Utah, Mrs. A. P. Thompson, Captain F. M. 

 Bishop. 



Eaton's E. stenophyllum, Bot. King, p. 152, t. 17, a homonym, is 

 his Aster arenarioides, vide supra. Nut tail's earlier E. stenophyllum in 

 PI. Gamb. is his E.foliosum, with narrower leaves. 



E. Ervendbergii. Strigoso-hirsutultim ; caulibus e basi decumbente 

 erectis gracillimis inferno crebre foliosis superne longe nudis moilo- 

 cephalis ; foliis lanceolatis basi attenuatis integerrimis vix pollicaribus ; 

 • involucri squamis subrequalibus strigoso-puberis ; ligulis 50-60 an- 

 gustis elongatis ut videtur albis ; ovariis glabellis ; pappo radii dis- 

 cique duplici, exteriori e setulis numerosis basi vix concretis diametro 

 ovarii aequalibus, interiori e setis uniseriatis fragilibus subdeciduis. — 

 Wartenberg, Mexico, Ervendberg, no. 69. Root not seen ; slender 

 stems a foot high. Head about as large as in E. strigosum. 



E. delphinifolium Willd. Bentham, in Gen. PI. p. 281, suspects 

 that the New Mexican plant" of Wright, no.' 1170 (with which agrees 

 Thurber's 771, and Palmer's 421 from Arizona), is different from the 

 original Mexican species. The exterior pappus indeed consists of 



