198 I,BAFLETS. 



lanceolate, lj4 to 2 inches long, sessile by a half-clasping 

 base, acute, all the foliage without notable veininess and 

 glabrous except as to a minute and obscure marginal series of 

 appressed hairs : peduncles under the heads pale with an 

 appressed and short fine pubescence : involucre of the termi- 

 nal head fully an inch broad, its bracts wholly herbaceous, 

 apparently in two or more series, their acuminate tips 

 recurved, their margins below minutely glandular-ciliolate 

 and the whole involucre viscidulous : ray-flowers 50-60, broad 

 as in asters but long, the expanded head 2 inches across, color 

 of rays mostly of a rich deep violet, though sometimes paler : 

 achenes silky-strigulose ; pappus simple, of rather firm and 

 numerous bristles. 



The center of distribution for this fine plant seems to be the 

 southern part of Wyoming and adjacent northern Colorado. 

 It is from that part of the West that the most copious display 

 of specimens is made by the larger herbaria. Excellent 

 examples have been distributed from various parts of Wyom- 

 ing by Prof. Nelson, from northern Colorado by C. C. Parry, 

 H. N. Patterson, C. S. Sheldon, Geo. E. Osterhout and 

 others, while from southern Colorado it was abundantly sent 

 out by C. F. Baker, and Mr. Standley gathered it in New 

 Mexico. These mentioned are all in flower only. Mature 

 heads with ripe achenes are in my own herbarium in abun- 

 dance, the specimens all taken by myself on I^ittle Ouray 

 Mountain below Marshall Pass, Colo., in 1896. From Oregon, 

 Washington, Idaho and the mountains of British Columbia 

 come plants named E. salsuginosus which seem to belong to 

 this E. callianthemus ; though from so wide a range, and from 

 such diversity of climatic and other conditions, the plants 

 show a considerable degree of variation, but chiefly as to size 

 of the plants, along with deviations from the typical leaf outline. 

 But there are other western and far northwestern allies that 

 demand rank as specifically separate from this most beautiful 

 of Rocky Mountain asteraceous plants. 



