Chap. IV. 



LYTHRUM SALICARIA. 



139 



Fig. 10 



Long- 

 etyled. 



Mid- 

 etyled. 



Short- 

 Ptyled. 



Diagram of the flowers of the three forms of Lythrum salicaria, in 

 their natural position, with the petals and calyx removed on the near 



side : enlarged six times. # . 



The dotted lines with the arrows show the directions m which 



pollen must be carried to each stigma to ensure full fertility. 



