COMPOSITAE. 271 



Aster douglasii Lindl. Glabrous or nearly so; stems erect, branched above, 

 30-120 cm. high; leaves thinnish, lanceolate, sessile, broadest near the middle, 

 acute, serrate near the middle or entire, 5-15 cm. long, those on the branches 

 much smaller; heads usually numerous, panicled; involucre 10-12 mm. high, 

 the bracts green at the tips, narrow, acute, the outer ones sometimes foliaceous 

 and passing into the reduced leaves of the branchlets; rays pale violet, 10-12 

 mm. long. Moist places along the Spokane River. A very variable species 

 as at present understood, the typical plant occurring near the seacoast. 



Aster stenomeres Gray. Stems tufted, rigid, pubescent, from a branched 

 woody base, 10-30 cm. high; leaves numerous, linear, 1-nerved, 1-2 cm. long, 

 acute, mucronate, rather rigid, very scabrous; involucre hemispheric, 12-15 

 mm. broad; bracts linear, attenuate-acute, rather thin, in two series, usually 

 purple-tinged, pubescent; rays violet, 15-20 mm. long; akenes flat, villous; 

 pappus sordid, double, the outer bristles very short. Summit of Mount 

 Carlton, Kreager, and near Rathdrum, Sandberg, Heller & MacDougal. 



Aster occidentalis intermedius Gray. Perennial, erect, glabrous or nearly 

 ■so; leaves rather thick, the basal lanceolate, acute, somewhat serrate or entire, 

 petioled, the cauline sessile, lanceolate, mostly serrate, the uppermost much 

 reduced; inflorescence loosely corymbose-paniculate; involucre campanulate, 

 10-12 cm. broad, the bracts loosely imbricated, subequal, linear, acute, green 

 but not at all foliaceous; rays violet orwhite, 1 cm. long; akenes sparsely pilose ; 

 pappus sordid. In dry or gravelly soil. 



Aster fremonti (T. & G.) Gray. Perennial, somewhat pubescent or nearly 

 glabrous, 50-100 cm. high, usually branched above; larger leaves thin, oblong- 

 lanceolate, entire, acute or obtuse, scabrous on the margin, 2-5 cm. long, only 

 the lowermost petioled, the others sessile and partly clasping, those on the 

 flowering branches small, linear; heads loosely corymbose, the peduncles 

 nearly naked; involucre 7-9 mm. high, broadly campanulate, the bracts all 

 alike, linear, acute, loosely imbricated, nearly equal; rays violet, 6-8 mm. 

 long. In moist copses, common and variable. 



403. CHRYSOPSIS. 



Low herbs; leaves numerous, alternate, sessile; heads solitary 

 or in corymbs with yellow flowers ; rays fertile or sometimes want- 

 ing; involucral-scales narrow, acute, with scarious margins; 

 receptacle flat ; style-branches with appendages ; pappus double, 

 of two kinds, the interior of long copious capillary bristles, the 

 exterior of short bristles or chaffy scales ; akenes oblong-linear or 

 ovate-oblong, compressed, hairy. 



Leaves canescent, strigose, or hirsute. C. villosa. 



Leaves green, hirsute and hispid. C. hispida. 



Chrysopsis villosa (Pursh) Nutt. Perennial, the stems decumbent or 

 suberect, 15-30 cm. long, canescent throughout and more or less villous; 

 leaves numerous, oblong or oblanceolate, mostly acute, sessile or nearly so, 

 2-3 cm. long; heads solitary or corymbed terminating short leafy branches; 

 involucre hemispherical, 10-15 mm. broad; bracts canescent or nearly glabrous; 

 rays golden-yellow; akenes obovate, pubescent; outer pappus very short. 

 In gravelly or rocky soil. 



Chrysopsis hispida (Hook.) Nutt. Very similar to C. villosa but herbage 

 green; pubescence hirsute and hispid, not canescent; heads somewhat smaller. 

 In gravelly soil, Spokane County. 



