140 
BOTANY. 
and slightly spreading, inner ones apprcsscd, chartaceous with greenish tips. — 
Plains of the Snake River, (Nuttall.) Valleys of Nevada and Northwestern 
Utah ; 4,500-6,000 feet elevation ; June-October. Very near the next, but 
it may generally be distinguished by its more slender habit and very narrow 
leaves. (498.) 
Aster falcatus, Lindl. Stems minutely pubescent with appressed 
hairs, 1-1 J° ^lig^^? leafy to the top; leaves rigid, minutely appressed-pubes- 
cent, or smoothish except on the edges ; the lower ones spatulate-lanceolate, 
often obtuse, 2-3/ long, 4-6" wide, short-stalked ; the upper ones oblong- 
linear, sessile, often slightly clasping, those on the mostly erect branches 
linear, but never subulate ; heads terminal on the branchlets ; involucre flat- 
tened-hemispherical, 4-5" wide on the fresh plant ; scales much imbricated, 
the outer smaller, all with greenish appressed or slightly spreading acute tips 
and whitish chartaceous margins ; achenia pubescent. — This species must in- 
clude A. campestris and A. ramulosus of Nuttall. Arctic America to Oregon, 
California, Nevada (Anderson) and Wyoming. Virginia Mountains and in 
the Wahsatch; 6,000 feet elevation; July-October (499.) A for m with 
wider leaves, slightly larger heads, and a harsher pubescence was collected 
on the Truckee River and in the \Yest Humboldt Mountains, (500,) and a 
still larger and much branched plant, with something the habit of A. oUongi- 
folius^ at Brigham City, Utah. (501.) 
Aster Bloomeri, Gray. Proc. Amer. Acad., 6. 539. Low^, somewhat 
tufted and spreading ; branches 4-8' long, leafy ; leaves small, 3-6" long, 
oblong-linear or the lowest hnear-spatulate, sessile, 1 -nerved, hispidly scab- 
rous and ciliolate; heads terminal, single; involucre hemispherical, 3-4" 
wide ; the scales loosely imbricated in about 3 series, linear-lanceolate, herba- 
ceous along the midvein and at the apex, minutely glandular ; rays pale pur- 
plish ; achenia pubescent. — A small, irregularly growing species, with rigid 
assurgent and branching stems and very scabrous foliage, referred by Dr. 
Gray, though wdth some hesitation, to the Ericoidei. On Mt. Davidson, Ne- 
vada, (H. G. Bloomer.) 
Aster simplex, Willd. Common in the Atlantic States ; Canada, Wis- 
consin, and California, (Brewer.) To this species is referred a plant lj° 
high, densely !:> ranched above ; leaves scabrous-cihate on the margins, nearly 
entire ; the larger ones Unear-lanceolate, 2-3' long, 3-4" wide ; upper ones 
oblong-linear, sUghtly clasping ; heads very numerous, in dense terminal co- 
