14 MYSTERIES OF THE FLOWERS 



Position of stamen and pistil, including 

 dimorphic and trimorphic flowers. 



Stamens and pistils developing at dif- 

 ferent times, called "dichogamous." 



Various mechanical devices which aid 

 cross-fertilisation and preclude self- 

 fertilisation. 



These methods we will now take up in the order 

 stated. 



