3o8 



Carduaceae 



Arnica 



eradiata 



(A. Gray.) 



Heller. 



Rayless 



Arnica. 



Densely soft -hairy throughout ; 

 simple or branched, 12-18 inches 

 high. Leaves oblong, ovate- 

 lanceolate or the upper ones 

 lanceolate, obtuse or acute, en- 

 tire or sharply denticulate, 1-3 

 inches long. Heads of flowers on short, hairy 

 peduncles, without rays; involucre \ an inch 

 high, bracts lanceolate, acute ; achenes black, 

 smooth or nearly so; pappus tawny. 



On grassy alpine slopes through the Rockies 

 at the higher elevations; flowering in July. 



Senecio 

 pseudaureus 



Rydb. 

 Western 

 Golden 

 Ragwort 



Smooth from a creeping root- 

 stock, 1-2 feet high. Leaves 

 smooth, basal broadly ovate, 

 somewhat cordate, serrate, i-J 3 

 inches long, long-petioled ; stem 

 leaves more or less laciniate at 

 the base, the upper sessile. Heads of flowers 

 J of an inch high in a flat-topped corymb, 

 rays bright orange-yellow, J of an inch long. 

 In moist ground and borders of woods 

 and slopes throughout the Rockies at the 



