Carduaceae 311 



In stony dry ground and slopes throughout 

 the Rockies at the lower altitudes; flowering 

 in June. 



More or less woolly when young, 



Senecio 



lugens soon smo th; stem stout, 1-3 



Richards. feet high. Basal and lower 

 Black-tipped leaves oblong or oval, obtuse or 

 Groundsel. acute? denticulate or dentate, 2-5 

 inches long, J ij inches wide, narrowed into 

 margined petioles; upper leaves few, sessile, 

 small and bract-like. Heads of flowers sev- 

 eral or numerous, corymbose, often short - 

 peduncled, J to nearly an inch broad; 

 involucre campanulate, J J of an inch 

 high, its bracts lanceolate to oblong-lance- 

 olate, acute, green with conspicuous black 

 tips; rays 10-12, bright yellow, J an inch long. 

 In moist soil at the lower altitudes through- 

 out the Rockies; flowering in June. 



Senecio Rather stout, simple, 2-5 feet 



triangularis hi , Leaves thin, all more 

 Hook. 



or * ess etlo ^ e( ^ an( ^ dentate, 



Giant 



Ragwort. deltoid-lanceolate or the lower 



