380 COMPOSITE. 



spinesceut recurved tips: rays about 20, blue, broad and short. — Species 

 of western Nevada, but apparently reaching our borders in Mono Co. 



4. M. iiicaiia, Greene, 1. c. 62; Lindl. Bot. Reg. t. 1693 (1834), under 

 Diplopappus. Biennial, tall and loosely branching, commonly 2 ft. high 

 or more; herbage pale and only sparingly puberulent: lowest leaves 

 narrowly lanceolate, acute, entire, or with a few salient teeth; cauline 

 linear, obtuse, entire: bracts of the hemispherical involucre with long 

 slender acute spreading or recurved herbaceous tips: rays very numeroias 

 and narrow, violet: achenes appressed-pubescent. — Foothills and plains 

 of Kern Co. 



22. SERICOCARPUS, Nees. Perennials with upright leafy stems, 

 and small heads of white flowers in a terminal corymbose cyme. Leaves 

 entire, sessile. Involucre narrow, of imbricated and appressed coria- 

 ceous bracts with green-herbaceous squarrose tips. Rays few (5 or 6). 

 Style-tips lanceolate - subulate. Achenes narrow, little compressed, 

 2-nerved, silky- pubescent. 



5. Californicns, Durand, PI. Pratt. 90 (1855). Commonly 3 ft. high, 

 stout, sparsely woolly-hairy below, scabrous above: leaves thinuish, 

 lanceolate, 2 in long or more, 1-nerved : heads in sessile glomerate clus- 

 ters at the ends of the corymbose branches; bracts of the involucie fewer 

 and less squarrose than in the eastern and typical species. — Foothills of 

 the Sierra, fi'om Nevada Co., Pr alien, to Amador, Biuletti, also near 

 Donner Lake on the eastern slope, Sonne. A rare and most distinct 

 species, strangely referred to the Oregonian S. rigidus by recent writers. 



23. ASTER, Tournefort. Leafy-stemmed autumnal herbs with pan- 

 icied or somewhat corymbose heads. Involucre hemispherical to cam- 

 panulate, of several series of unequal imbricate bracts with herbaceous 

 tips. Rays many, not very narrow, white, pinkish, or bluisli. Disk- 

 corollas yellow changing to red-purple; tube slender; limb funnelform. 

 Style-appendages from triangular-lanceolate to slender-subulate. Ach- 

 enes compressed. Pappus copious, dull white, or rarely more deeply 

 colored, scabrous. 



* Erect perennials, leafy-stemmed; heads in a somewhat flat-topped ter- 

 minal cluster. 



1. A. raduliniis, Gray, Proc. Am. Acad. viii. 388 (1872). Stoutish, 

 roughish-pubescent, 1 ft. high or more, the mostly solitary stem usxially 

 bearing an open corymb of middle sized heads: leaves rigid, obovate- 

 oblong, acute, sharply serrate above, tapering to a narrow entire base, 

 scabrous both sides: involucre obconic, 4—5 Imes long; bracts rigid, 



