3io Carduaceae 



times truncate at the base, obtuse, crenate 

 or sinuate, light green; lower stem-leaves 

 lanceolate in outline and petioled, the upper 

 lanceolate or linear and sessile, deeply 

 pinnatifid with narrow oblong or linear seg- 

 ments, cymes contracted, corymbose. Heads 

 J of an inch or more high; bracts linear, 

 acute, yellowish-green and occasionally with 

 brownish tips; rays pale yellow, J an inch 

 long, 4-nerved or often lacking. 



In the lower valleys of the Rockies, on the 

 borders of woods, thickets, and marshes; 

 flowering in July. 



Senecio Permanently silvery-hairy with 



canusHook. felted hairs; stems several, 6-12 

 Silvery inches high from a woody base. 



Leaves sometimes all undivided, 

 the radicle and lower from spatulate to 

 oblong or roundish-oval, J-iJ inches long, 

 slender-petioled, sometimes laciniate-toothed, 

 or pinnatifid. Heads of flowers few and ter- 

 minal, J to nearly half an inch high ; rays 

 yellow, nearly J an inch long. 



