220 PITTONIA. 
green or glaucescent, entire or obscurely and remotely ser- 
rate toothed, marked by a white midvein and some fine less 
obvious reticulation: involucres turbinate or subeampanu- 
late, their bracts narrowly lance-linear, very acute, the nar- 
row light-green herbaceous tips pervaded by a fine but 
distinet white midnerve, the margins remotely serrulate- 
ciliolate: rays many, usually long and showy, pinkish to 
rose-purplish. 
This is a rather neat and attractive lowland meadow 
Aster probably common in Wyoming and adjacent Colorado 
along streams in mountain parks. My specimens are nearly 
all from Mr. A. Nelson; and I give his numbers in the 
order of the excellence of their character as types. No. 
5,293, from Hutton's Lake, Albany County, 1898; n. 6,870, 
from Laramie, Sept, 1899; n. 1,151, from Laramie City 
Park, 30 Sept., 1894; n. 964, from the Gros Ventres River, 
23 Aug., 1894; n. 1,118, from “East Fork,” 25 Aug., 1894. 
I have also one fairly typical specimen from along the 
Platte in North Park, Colorado, 10 Sept., 1899, collected by 
Mr. Osterhout; but on the sheet are two other specimens 
which I should not refer here. Another by Blankin- 
ship, from Pass Creek, Big Horn Mountains, Wyoming, may 
be the same, though its involucre is very foliaceous, the 
outer bracts as long as the inner. 
A. PROXIMUS. With vegetative characteristics of the last, 
but of a deeper green, the foliage more ampliate and 
spreading, all the leaves quite entire; inflorescence more 
truly paniculate and open: involucres campanulate, the 
outer bracts wholly herbaceous and spreading, the green 
tips of even the innermost also spreading, all cuspidately 
acute: rays 35 or more, large and showy, flesh-color to rose- 
purple. 
