191 



ACHILLEA MILLEFOLIUM. 



YARROW, OR MILFOIL. 



Rootstock perennial, creeping extensively under- 

 ground, with smooth reddish stolons. Stems 2 to 3 

 feet, erect, furrowed, woolly or sub-glabrous. Stem- 

 leaves lanceolate ; radical leaves stalked, both doubly 

 pinnatifid ; lobes cut into linear segments. Heads 

 corymbose, dense. Phyllodes oblong, obtuse, glabrous. 

 Flowers white' or pink. Ray flowers few, ligule broad 

 as long. Disc flowers perfect, five-toothed. Fruit 

 oblong, compressed, shining. Flowers June to Sep- 

 tember. Native of Northern Europe, Northern and 

 Western Asia, Northern India, and North America. 



