Carduaceae 313 



flowers usually white, fragrant, the marginal 

 ones of the pistillate heads with narrow pink- 

 ish or white rays about J of an inch long ; cot- 

 tony in fruit. 



In wet places and along streams at the 

 lower altitudes throughout the Rockies; 

 flowering in May and early June before the 

 leaves appear. 



Scape slender and scaly, 6-12 in- 



sagittata 



Petasites ches high L eaves deltoid-ovate 



(Pursh ) or rem f rm - va te, persistent- 



A. Gray. ly white-tomentose beneath; 

 Arrow- smooth or nearly so above 



leaved ^_ IO ^^5 long, thin, margins 



Coltsfoot. . , 



sinuate-dentate, not cleft or 



lobed. Heads dioecious, loosely corymbose, 

 involucre campanulate, J of an inch high; 

 flowers nearly white, the marginal ones of 

 the pistillate heads with white rays. 



In similar situations to the preceding; in 

 wet places and along streams at the lower 

 altitudes throughout the Rockies; readily 

 distinguished by the shape of its leaves; 

 flowering in May and early June. 



