44 



ELEMENTS OF STRUCTURAL BOTANY. 



the stamens, be found to spring from the axil 

 of a, scale (Fig. GG). The stigma is two-lobecl, 

 and on carefully opening the ovary you observe 

 that though there is but one cell, yet there are 

 two roics of seeds. We therefore infer that the 

 pistil consists of two carpels. The pistillate 

 flowers, like the staminate, are achlamjdeous. 

 In dioecious plants, the process of fertilization 

 IS assisted by insects, and also very largely by 

 the wind. 



HEART-LEAVED WIL.LOW. 



Fig. 66. 



