POLLEN 



151 



vail is the fruit, with its contained seeds all ready 

 to germinate. 



"Let us cite a few of the numerous experiments 

 that prove the absolute indispensability of pollen. 



' ' Most flowers have both stamens and pistils ; but 

 there are plants that have their stamens and pistils 

 in separate flowers. Sometimes the flowers with sta- 

 mens only and those with pistils only are found on 

 the same plant; sometimes they are found on sepa- 

 rate plants. Plants 

 having flowers with 

 stamens only and 

 flowers with pistils 

 only on the same 

 stock are called 

 monoecious plants. 

 This expression 

 means 'living in 

 one house. ' The 

 flowers with sta- 

 mens and those Stamens 



with pistils do indeed live together in the same house, 

 since they are found on the same plant. The pump- 

 kin, cucumber, melon, hazel-nut-tree are monoecious 

 plants. 



"Where flowers with stamens and those with pis- 

 tils are found on different stocks, the plants are 

 termed dioecious; that is to say, they are double- 

 house plants. Hemp, the locust-tree, and the date- 

 tree are dioecious. 



"It is especially in monoecious and dioecious plants 



