STUDIES IN THE COMPOSITAE. 61 
Frequent at low altitudes from the high plains of Wyo- 
ming to the eastern slope of the Californian Sierra; possi- 
bly including Nuttall’s Dieteria pulverulenta, or divaricata, or 
viscosa, or all three; but I have seen no types of these, and 
am not able to make out from the descriptions what they 
should be. I therefore deem it unwise to attempt to apply 
any of those names. Ur 
6. M. LEUCA OLIA. Aster leucanthemifolius, Greene, 
Eryth. iii. 119 (1895). Since this was published I have found 
it well to the northward of the original station, in the West 
Humboldt Mts., Nevada. Some of Mr. Shockley's specimens 
distributed are depauperate and poorly illustrate the species. 
The type specimen is in the herbarium of the California 
Academy. 
7. M. LÆTEVIRENS. Perennial, rather small and slender, 
branched only sparingly, and that terminally and corym- 
bosely, only the involucre puberulent, all the herbage bright 
green and glabrous: radical leaves obovate, entire, obtuse, 
prominently cuspidate-mucronate, tapering to a petiole as 
long as the blade; cauline narrower, some oblanceolate and 
serrate, others quite entire: bracts of the rather narrow in- 
volucre of firm texture, the short green tips pungently acute, 
seldom recurved: rays few, violet: achenes hispidulous ; 
pappus firm. 
Foothills of the Clover Mountains, Nevada, July, 1894. 
8. M. Suasrensis, Gray, Proc. Am. Acad. vi. 539 (1865). 
- Aster Shastensis, Gray, Bot. Cal. i. 323.—Biennial or peren- 
nial, of the size and habit of the preceding, but finely and 
pulverulently or granularly puberulent throughout, and the 
involucral bracts and lower parts of the plant purplish ; 
leaves all oblanceolate, entire, abruptly acute but not mucro- 
nate : heads turbinate, the oblong-linear scarcely acute bracts 
. erect even to the tips, where they are ciliolate-margined : 
