306 Carduaceae 



From lightly hairy to densely 

 Arnica 



Chamissonis so or nearl y smooth, 1-2 feet 

 Less. high. Leaves rather thin, hairy, 



Chamisso's oblong to oblong-lanceolate, den- 

 Armca. ^ Q Qr d en ti c ulate, acute or 



obtuse, lowest tapering into a margined 

 petiole, upper broad at the base and some- 

 what clasping. Heads J an inch or more 

 high, single or several on hairy peduncles; 

 involucral bracts J of an inch or more long, 

 oblong-lanceolate, acuminate, glandular- 

 hairy; ra}is bright yellow, J an inch or more 

 long with a single notch at the apex, rather 

 broad; achenes with a few scattered hairs; 

 pappus tawny. 



On the borders of streams and wet places 

 at the lower altitudes throughout the region ; 

 flowering in July. 



Slender, hairy, 3-8 inches high. 

 Arnica 

 louiseana Leaves in about 3 pairs, the 



Farr. two lowest at the base of the 



Pale-flow- stem, iJ-2 inches long, elliptical 

 ered Arnica. QJ , o ] DOvate) entire or denticulate, 

 glandular-hairy on both surfaces, as are the 



