314 Carduaceae 



Petasites Scape very scaly, 3-10 inches 

 frigida (L.) high. Leaves thin, hastate-reni- 

 Fries. form to triangular-ovate, 1-4 



inches long, irregularly and an- 

 gulately lobed and incised, 

 smooth and green above, persistently white- 

 woolly beneath, the lobes entire or few- 

 toothed. Heads usually few, \ an inch or 

 more high in a capitate corymb; involucre 

 short, campanulate ; flowers nearly white and 

 fragrant, the marginal ones of the pistillate 

 heads with white or pinkish rays } of an inch 

 or more long. 



In shaded wet places and along alpine 

 brooks at the high altitudes throughout the 

 region; flowering during June and July with 

 the expanding leaves. 



Achillea Woolly throughout ; stems simple , 



lanulosa 6 inches to 2 feet high. Leaves 



Nutt. narrowly oblong in outline, bi- 



Y 'arrow. pmnately dissected into numer- 



ous small linear divisions. Heads numerous, 

 crowded into a rather contracted cyme; 



