300 Carduaceae 



rays violet or purple, nearly J an inch long. 

 In wet places and along streams through- 

 out the Rockies; flowering during July 

 and August. 



Slightly hairy or smooth, simple 

 Bucephalus or somewhat branched, 1 8 inches 



Engelmanni 



p c to 2 feet high, bnght green. 



Eaton) Leaves thin, ovate-oblong to 



Greene. broadly lanceolate, 2-4 inches 



Engel- long, loosely veined, tapering at 



mann's 



Aster apex into a slender- spined 



tip, the larger sometimes with 

 a few small acute teeth. Heads \ an inch 

 high, hemispherical, either racemosely dis- 

 posed on slender axillary peduncles, or 

 somewhat cymose; involucral bracts mostly 

 acute or acuminate, some outer ones loose, 

 narrow, and partly herbaceous, or with loose 

 pointed tips; inner purplish; rays about \ 

 an inch long, spreading, violet or pinkish. 



In open woods and on slopes, principally 

 in the Rockies at the higher elevations; 

 flowering during July. 



