XVI I ] 



WATER MILFOIL 



221 



Fig. 144. Myriophyllum verticillatum, L. August 15, 1911. A, the inflorescence 

 shows in succession female, hermaphrodite and female flowers. Three turions, T, 

 occur on the lower part of the axis. (Reduced.) For the further development of 

 one of these turions see Fig. 145, p. 222. B shows an hermaphrodite flower and its 



subtending leaf. (Enlarged.) [A. A.J 



