148 BOTANY. 
linear, in two rows, outer ones herbaceous, inner ones with somewhat scarioiis 
narrow margins and long slender tips ; rays many, twice as long as the 
involucre ; achenia hirsute ; pappus of 12-15 bristles as long the disk- corollas, 
besides an evident outer series of minute setse. — Greenland and Arctic 
America to California and Colorado. Uintas, near Bear River; 9-12,000 feet 
elevation ; August. (529.) 
Yar. DiscoiDEUM, Gray. Sill Journ., n. s., 33. 8. Eays none, or some- 
times present, but shorter than the flowers of the disk — Colorado, (Parry,) 
and California, (Bolander.) Higher peaks of Nevada and Utah ; 8,500- 
10,000 feet altitude ; June-September. (530.) 
Erigeron Bloomeri, Gray. Proc. Amer. Acad., 6. 540. Perennial; 
caudex much branched from a deep fusiform root; stems 3-8' high, leafy 
below, naked for several inches below the solitary heads ; leaves narrowly 
linear, almost filiform, 1-3' long, less than a line wide, somewhat cinereous, 
like the stems, with a fine appressed pubescence ; involucre woolly-pubescent, 
the scales in a single series, about as long as the disk; rays none; achenia 
flat, rather narrow, finely hirsute towards the summit ; pappus simple, the 
bristles shorter than the corolla. — Near Carson City, (Anderson,) and near 
Virginia City, (Bloomer.) Western Nevada to the East Humboldt Moun- 
tains; 5-8,000 feet elevation ; May-July. (531.) 
Erigeron grandiflorum. Hook. Perennial, hirsute and somewhat 
woolly ; stems 1-5 in number, 4-8' high, rather leafy; radical leaves obovate- 
spatulate, lj-2' long, 4-5" wide, those of the stem smaller and lanceolate ; 
heads large for the plant ; involucre very woolly ; the scales herbaceous, 
elongated, with naked purplish tips; rays long and broad, white or purple ; 
achenia sparingly hirsute ; pappus of barbellate setse rather shorter than the 
disk-corollas, and with a few very short ones intermixed. — Rocky Mountains 
of British Ameiica. On a ridge above Bear River, Uinta Mountains; 
11,000 feet elevation; specimens exactly like the figure in Hooker's Fl. Bor. 
Amer,, L 123. (532.) 
A smaller form, the leaves narrower, and the heads only half as large, 
but in all other respects like the type, was also collected on the Uintas near 
Bear River, elevation 11-12,000 feet. The same form, probably, was found 
farther north in Palliser's Expedition ; See Pallis. Re^}. p., 263. (533.) 
Erigeron ursinum. Perennial, csespitose; stems hirsutulous, 4-T 
