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ASTER . COMPOSIT © 309 
dilated and obtuse green tips, appressed, the outer successively shorter: 
rere about 20, purple or violet, nearly half-inch long: achenes compressed © 
minutely pubescent. In Southern Oregon to California. 
A. Hallii Gray Proc. Am, Acad. viii, 388. Stems slender, strict, 1-2 
feet high, leafy to the top, bearing numerous, short racemousely disposed 
flowering branches, these minutely pubescent; leaves, I--2 inches long by 
1-2 lines broad, entire, scabrous-ciliate, otherwise smooth and glabrous, 
neither dilated nor contracted at base: heads numerous, 3-4 lines high, 
somewhat racemosely paniculate and crowded: involucre campanulate, 
glabrous; the bracts subspatulate-linear, with oval or oblong green tips, 
rather close and erect: rays white or whitish, 2-3 lines long. Along ditches 
and embankments, Willamette Valley,-Oregen. 
A. Fremonti Gray Syn. Fl. 1, Pt. 2,191. Stems slender, erect,1-2 feet 
high,glabrous or the upper parts soft-pubescent: leaves thinnish, the mar- 
gins either quite naked and smooth or obscurely ciliolate-scabrous, radi- 
cal and lowest cauline oblong or oblanceolate, or somewhat oboyate, 1--3 
inches long, tapering into a slender margined petiole; cauline from ob- 
long:lanceolate to linear, commonly half-clasping at base: heads solitary 
in the smaller specimens, severalin the larger, 4-6 lines high, somewhat 
naked-peduncled: bracts of the involucre narrowly linear, obtuse or acut- 
ish, or the inner acute, some of the outer shorter, all loose and similiar: 
rays numerous; 4-6 lines long. Inwet mountain meadows, Cascade moun- 
tains near Mt. Hood to the Rocky mountains. 
A. occidentalis. Nutt. T. & G. Fl. ii, 164. Smooth and glabrous, or 
minutely pubescent below the heads, slender, 1--2 feet high; small plants 
simple, bearing several to numerous corymbose or paniculate heads: 
leaves mainly linear and narrow; cauline 1-3 inches lorfg by 1-3 lines 
broad, rarely lanceolate and larger; radical, sometimes lanceolate-spatu- 
late, with long tapering base: heads 4- 6 lines high: involucral bracts nar- 
rowly- or subulate-Jinear acute or acutish, thinnish, loose, obviously im- 
bricated of two or three lengths: rays light violet,4-—5 lines long. In moist 
meadows in Eastern Oregon and Washington to the Rocky mountains. 
Var. intermedius Gray Syn. Fl. i, Pt. 2, 192. Stems slender, 1-2. 
feet high rather rigid; somewhat sparingly leafy, with paniculate flower- 
ing branches: radical and sometimes cauline leaves lanceolate: short outer 
bracts of the involucre often quite obtuse. On edge of wet mountain 
meadows of Washington to California. 
A. Oreganus Nutt. T. & G. Fl. ii, 164. Nearly glabrous: stem rather 
slender, 2 feet high, paniculate branched at summit or bearing several to 
many, paniculate heads: leaves linear-lanceolate, entire: heads about 3 
lines high; bracts of the involucre loose, the outer ones herbaceous, lanceo- 
late, acute, not longer than the thin and narrow inner ones: rays about 
2lines long whiteor purplish. On wet banks of streams, Oregon and 
Washington to Idaho. 
A. Douglasii Lindl. DC. Prodr. v, 239. Glabrous or nearly so: 
stems 2-6 feet high with erect or ascending branches, bearing several or 
numerous paniculate heads: leaves, lanceolate, 2-6 inches long, tapering to 
both ends, more or less petioled, commonly serrate along the middle by 
acute and appressed or erect teeth: beads numerous, 5-6 lines high: bracts 
of the involucre linear, acute, loosely imbricated, the small green tips 
commonly spreading outer foliaceous ones few and not dilated, often want- 
ing: rays 20--30, violet to purple, 6-8 lines long: achenes smooth. Com- 
nee along streams andriver bottoms of Northern California to British 
olumbia. 
Ae foliaceus Lindl. DC. Prodr. y, 228. Smooth and glabrous or 
the upper part of stem tomentulose or pubescent: leaves from broadly 
