- 808 COMPOSITE ASTER 
subalpine woods and meadows in the Cascade mountains, Washington to 
California and Montana. 
A campestris Nutt. 1. c. 293 Pruinose-puberulent and viscidulous; 
stems 10-15 inches high, branching: leaves linear, about an inch long by 
2-4 lines broad or the lower lingulate-spatulate, mostly glabriate, same ob- 
scurely 3-nerved: involucre 3-4 lines high hemispherical, of rather few- 
ranked and little unequal linear, acute bracts pruinose-glandular: rays 
3-4 lines long, light violet or purple. Low grounds and plains British 
Columbia to California, Idaho and Montana. . ; 
A. modestus Lincl. Hook. Fl. ii, 8. Merely pubescent or glabrate: 
stems rather slender, 2-3 feet high, simple, very leafy: leaves thinnish, 
lanceolate or broader, 1-4 inches long, sparringly and acutely serrate or 
denticulate,very acute, mostly narrowed to a sessile or partly clasping, but 
not auriculate base : heads hemispherical, numerous and usually thyrsoidly 
or cymosely congested at the summit of the stem: bracts of the involucre 
loose and more or less herbaceous almost from the base, linear, attenuate, 
all equalling the disk: rays numerous and narrow, pale blue to violet: style 
appendages lanceolate: acbenes hirsute. Along mountain streams, Brit- 
ish Columbia to Oregon. Saskatchewan and Pembina. 
* * Heads and infloresence, various, radical leaves all acute or at- 
tenuate at base, not glandular nor viscid nor silky-canescent: achenes 
compressed, few nerved. 
A. Geyeri. A. levis Var. Geyert Gray. Whole piant very smooth and 
labrous: stem stout, a foot or two high, rigid: Jeaves from ovate or ob- 
ong to lanceolate, 4 or 5 inches long, decreasing upward to subulate 
bracts ; radical and lowest cauline contracted below into a winged petiole; 
upy-er all with auriculate or subcordate partly claspfng base: heads sparse- 
ly tbyrsoid-paniculate, on short and rigid branchlets: involucre campanu- 
late, the whitish subcoriaceous bracts mostly attenuate-acute, with ob- 
scure green tips: rays 20-30, broadish, sky-blue to violet: achenes glabrous 
or nearly so, 4-5 ribbed. Valleys of Idaho to the Rocky mountains. 
A. commutatus Gray Syn. Fl. i, Pt. 2,185. Stems rather slender, 
1-2 feet high, with divergent branches, cinereous or green: leaves small, 
all linear and entire scarcely narrowed atthe abrupt, closely sessile or 
partly clasping base, gc of the branehlets passing into involucral . 
bracts, the-e mostly with obtuse tips: heads numerous, racemosely dis- 
posed, 3-4 lines high and broad: involucre of squarrose or at least spread- 
ing herbaceous obtuse or merely pointed tips: rays 20-30, white: achenes 
canescent-hirsute. On plains and river banks Eastern Oregon and Wash- 
ington to Utah and Dakota. 
A. chammissonis Gray Bot. Wilkes 341. Glabrous or above romewhat 
hirsute: stems 2-5 feet high paniculately branched : leaves lanceolate, acute 
entire or the larger obscurely serrate, 2-5 inches long, scabrous with sparse 
appressed pubescence, or glabrous, those of the flowering branchlets be- 
coming small or minute and squarrose-spreading: heads loosely panicled, 
5--6 lines high: involucre broadly campanulate or somewhat obconical; its 
bracts numerous and imbricated in several ranks,thickish,linear-spatulate, 
with short and rounded green tips, the outer successively shorter: rays 
20-25 purple or violet, nearly halt inch long: achenes sparsely and mi- 
nutely pubescent. In moist thickets uf Southern Oregon to California. 
A. menziesii Lindl. Hook. Fl. ii, 12. Minutely hoary with a fine 
pubescence, or glabrate below; 1-2 feet high: stems and branches virgate, 
rigid : leaves lanceolate or linear, acute, entire, or the lower obtusely ser- 
rate, rather rigid, 1-2inches long by 2-4 lines broad: heads racemofe or 
anicled, 4--5 lines high: involucre campanulate; its bracts momerots und 
imbricated in several ranks, thickish; linear, with short tisually somewhat 
