204 LEAFLETS. 



involucral bracts much less numerous, glandular-scaberulous, 

 not darkened but of the same green as the foliage, of firm 

 texture and scarcely reflexed at tip : rays white. 



At 5000 feet on Mt. Adams, Washington, 5 Aug., 1885, 

 W. N. Suksdorf, his n. 2412 as in my herbarium ; sent out by 

 Mr. Suksdorf for A. salsuginovs, but by him remarked on as 

 different from the other salsuginous of lower altitudes on the 

 same mountain, that is, E. hesperocallis . He notes that this 

 smaller plant of greater elevations has white rays. He does 

 not note that the herbage is different both as to color and 

 texture, nor that this plant when dry remains colored as when 

 fresh. I should have been glad if I could have left this to 

 represent, on these higher elevations of coastward peaks, the 

 Rocky Mountain E. callianthemus in a small form. That is 

 what the specimens suggest, until you view the parts under a 

 lens. It has characters precluding its referability to that or 

 any other species. 



Within the almost or quite 600 miles stretch of the Sierra 

 Nevada of California nowhere exist the physiographic con- 

 ditions that have been given the E. hesperocallis of Oregon and 

 Washington, much less the environment of E. callianthemus 

 of the far inland and more arid as well as colder Rocky 

 Mountain chain. Yet plants of their type are more or less 

 frequent throughout some 500 miles, at least, of the Sierra 

 Nevada. It is a region — that of the higher elevations, where 

 alone these plants are found — which has been little explored, 

 but among the scanty material gathered, one notes here also a 

 number of things long ago labelled E. salsuginosus which need 

 not be looked for outside of this mountain range, and which 

 are mostly without name or description. The earliest known 

 California member which obtained a name as a variety is a 

 plant of subalpine heights in the northern Sierra to which Asa 

 Gray as long ago as 1876, while he still held these things to 

 be asters, named Aster salsuginosus var. angustif alius . It is 

 a well defined species and has been named in specific rank by 



