THE FLOWER. 



53 



EXEKOISE XIV. 

 The Receptacle. 



The peculiarities of plants pointed out in this 

 and the following exercise are not very common. 

 But pupils who are using the flower-schedule, and 

 collecting all the plants they can find, will be sure to 

 meet with examples of them sooner or later. These 

 exercises should, therefore, be carefully read, and 

 borne in mind, so that, when the features they de- 

 scribe are met with, they may be recognized. 



Before passing to the more minute observation of 

 the floral organs, the receptacle requires further study. 

 You have seen it forming a central convexity, like 

 that of Fig. 66, and gradually expanding into a 

 structure like Figs. 67 and 68. Sometimes the re- 



FIG. 66. 



Convex Receptacle. 



FIG. 6T. 



FIG. 68. 



Receptacle, enlarged, and shown in Section. 



The same, fully developed. 



