370 FOUNDATIONS OF BOTANT 



cross-pollinated. Usually they occur on plants which 

 also bear flowers adapted for cross-pollination, and in this 



Pig. 261. — a Violet, -with Cleistogamous Tlo-wers. 

 The objects Tfhioli look like flower-buds are cleistogamous flowers in various 

 stages of development. The pods are the fruit of similar flowers. The 

 plant is represented as it appears in late July or August, after the ordi- 

 nary flowers have disappeared. 



