SOME ROCKY MOUNTAIN ASTERS. oer 
Represented with me by Mr. Nelson’s n. 6,788, from Madi- 
son River, Yellowstone Park, and n. 2,478, from Pass Creek, 
Wyoming. Necessarily separated from A. letevirens, to 
which it is next of kin, on account of its loose panicled 
inflorescence and thinner greener involucral bracts with 
recurved tips. 
A.ExsuL. With the red stems and light-green glaucescent 
herbage of A. letevirens, but stouter and low, less than a foot 
high; leaves larger in proportion, of a thick, firm texture 
and veinless, spatulate-lanceolate, sessile by a cordate-clasp- 
ing base, sharply scabrous-serrulate, otherwise glabrous: in- 
florescence racemose-panicled, but short and rather dense: 
involucres small, their firm erect bracts almost linear, acute, 
with narrow pale-green tips: rays about 25, bluish. 
On stream banks of the Humboldt River meadows at 
Deeth, Nevada, 5 August, 1895, collected by myself only. 
A. VALLICOLA. Slender, erect, 1 to 21 feet high, simple 
up to the lax corymbose or corymbose-paniculate inflores- 
cence; only the pedicels of the few heads and their bracts 
hoary-puberulent, the main stem and few branches glabrous: 
leaves mostly subradical, lanceolate or oblanceolate, only 3 
or 4 inches long including the slender hirsute-ciliate petiole, 
glabrous, the entire or faintly serrate-toothed margins deli- 
cately scaberulous; cauline leaves few, reduced and sessile, 
varying from lance-linear to linear, but always with a 
widened and half-clasping base: involucres small, almost 
hemispherical, their linear-lanceolate bracts in about 3 
series,almost wholly green-herbaceous and not very unequal, 
their narrow whitish margins below obscurely ciliolate or 
quite naked; rays 35 to 40, pale purplish. 
Abnndant i in moist meadows of Pine Valley, above Pali- 
sade, Nevada, collected by the writer, 25 July, 1896. 
