MII.I'OIL 



53 



dirty-yellow tiihr. The fruit is smooth and shining;-. The tlowcrlicatls 

 are often pink. 



1 he height \arics Iroin i to j ft. i'lowcrs arc to \k- lonnd between 

 June <ind September. Miltoil is a ciecitluous, heri)aceous, ])eremiial, 

 propagated by di\ision. 



The head is made up of several small tk)rets, which make it 

 attractive, and lead to cross-pollination. The disk florets ha\e a tube 

 J mm. lon'.^, with a throat i mm. loii'', and wide, liavinL: li\e lrian<'ular 



Milfoil (Achillea Millefoliuin, I..) 



teeth. At the base of the style a ringlike ridge secretes honey. The 

 honey rises in the tube and short-lipped insects can reach it. The 

 lobes of the style are pressed together when the flowerhead o]uns, and 

 project with spreading" hairs into the lower i)art ol the cylinder. When 

 the style lengthens pollen is pressed out oi the upper end of the tube, 

 the lobes of the style project and spread, turning the stigmatic ends 

 upwards, bending the hairy tijjs back so that some pollen sticks to 

 them, and so is not left for insects. When the pollen is pushed up 

 the tube projects beyond the corolla. When the stigmas project the 

 tube lies lower in the corolla, depressed by the contracting filaments. 

 In this way the stigmas may lie aljove the corolla where the pollen 

 was. As the abdomen of an insect sweeps over a llower it touches 

 many florets, and also causes cross-pollination. 



