54 PITTONIA. 
of a nature equally foreign to those of both Dellingeria and — 
“Aster. Its much imbricated bracts are broad, erect, and 
either carinate very distinctly, or at least carinately nerved. - 
The pubescence, when any is developed in the group, is not | 
describe as new, I published as a Sericocarpus, not at the 
time recalling Nuttall's long suppressed genus, and percelv- - 
ing my plant to be, at all events, a thing naturally foreign 
to Aster, and more nearly a Sericocarpus. I afterwards 
learned that Nuttall himself had noted an affinity between 
Eucephalus and Sericocarpus, and that he had observed the 
upwardly dilated pappus-bristles to be equally characterist 
of both. 
Of EucEPHALUS I distinguish readily the following specie 
. 
1. E. zLEGANS, Nutt. Trans. Am. Phil. Soc. vii. 298 (1840). 
Aster elegans, Torr. & Gray, Fl. ii. 159 (1841).—0Of the north- 
ern Rocky Mountains and westward, always at considerable 
elevations. Stems slender, very leafy ; leaves entire, acutish ; 
herbage of a vivid green but minutely scabrous; heads few 
the involucres purplish, the bracts so neatly cut and imbri 
cated as well as colored that the species well merits its name. 
2. E. ENGELMANNIIL Aster Engelmannii, Gray, Syn. Fl. | 
199 (1884), at least in large part, but excluding the named 
varieties. Plant tall and robust, wi 
achenes elongated, sparsely silky-pubescent. 
Fine specimens of this most beautiful species have now 
come in from beyond the British boundary, in Mr. Ma- 
coun’s collection of 1895, and are distributed under his num- 
ber 10236. ER 
