A POLLEN-BEARING 

 GRAPEVINE 



Plants of the grape differ as to the 

 character of their flowers. Some have 

 almost perfect blossoms; others are 

 staminate, or, at most, have only a rudi- 

 mentary ovary. The grape thus occu- 

 pies an intermediate position between 

 those plants that always bear perfect 

 flowers and those that always bear the 

 stamens and pistils on separate blos- 

 soms. The various arrangements sug- 

 gest the need of cross- fertilization in 

 the economy of plant life. 



