SOME ROCKY MOUNTAIN ASTERS. 219 
remarkable for its leafiness, and the peculiarly almost 
dichotomous open cyme of heads. 
A. Netsonu. Stemsslender, wiry, about 2 feet high from 
branching and only superficially seated subligneous root- 
stocks, simple, leafy throughout and racemosely or subcory- 
mbosely floriferous above the middle: cauline leaves (the 
basal not seen) about 3 inches long, firm, narrowly linear, 
entire, acute, sessile and half-clasping, 1-nerved, glabrous 
on both faces, the margin scabrellous: involucres broadly - 
turbinate, 3 lines high, their bracts imbricated in about 3 
series, the short outermost often wholly herbaceous, oblong 
and obtuse, the others successively narrower and lanceolate 
or linear, acute, pubescent on the back and marginally cili- 
ate, mostly well differentiated into lanceolate green tip and 
marginally colorless linear base: rays about 20, violet or 
paler, rather narrow and inconspicuous. 
The type specimens are in my herbarium from Fishers’ 
Ranch, Albany County, Wyoming, and were collected by 
A. Nelson, 13 Sept, 1898, and the label bears the num- 
ber 5,326. The same collector's n. 6,868, from the Laramie 
Hills, Sept., 1899, seems to be a larger and less simple state 
of the same, though with rather more numerous and broader 
involueral bracts. Again, his n. 1,758, from Centennial 
Valley, is nearly typical; only rather more amply leaty. 
A. LETEVIRENS. Stems very erect, 1 to 2 feet high, glab- 
rous except as marked by lines of pubescence decurrent from 
the leaves, commonly red or purple, otherwise pale and 
glaucescent, leafy, and somewhat equably so, even to the 
narrow and fastigiate or broader and subeorymbose pani- 
cle: leaves lanceolate, or oblong-lanceolate, sessile by a 
broad and almost auriculate-clasping base, thinnish, light- 
