aster COMPOSITE 309 



delated *od obtnse green tips, appressed, the outer successively shorter: 

 rays 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 racem^usely disposed 

 flowering branches, these minutely pubescent; leaves, 1-2 inches long by 

 1-2 lines broad, entire, scabroui-cihate, 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 Yalley, Oregon. 



A. Fremonti Gray Syn.Fl. 1, Pt. 2, 191. Stems slender, erect,l-2 feet 

 high, glabrous or the upper parts soft-pubescent: leaves thinnish, the mar- 

 gins either quite naked and smooth or obscurely ciliolatescabrous, 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 tbe smaller specimens, several in 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 tbe outer shorter, all loose and eimiliar: 

 ravs numerousj 4-6 lines long. In wet 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 long 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 eubulate-linear 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. intermedins 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 

 2 lines long white or 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 : heads 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- 

 mon along streams and river bottoms of Northern California to British 

 Columbia. 



A. foliaceus Lindl. DC. Prodr. v, 228. Smooth and glabrous or 

 the upper part of stem tomentulose or pubescent : leaves from broadly 



