THE INFLORESCENCE AND FLOWER. 



47 



When staminate, pistillate, and perfect flowers are all 

 found upon the same plant, it is polygamous. 



When you have filled out a schedule with the descrip- 

 tion of a flower, ask yourself the following questions about 

 it, and answer them, if you can, in writing, at the back of 

 the schedule : 



Is this flower symmetrical or unsymmetrical ? Is it 

 complete or incomplete ? Is it dichlamydeous, monochla- 



FIG. 155. 



Staminate Flower, from 

 Catkin (Fig. 154). 



FIG. 154, 

 Male Catkin of a Dioecious Plant. 



FIG. 156. 



mydeous, or achlamydeous ? Is it perfect or imperfect ? 

 Did it grow upon a monoecious, dioecious, or polygamous 

 plant ? 



EXERCISE XIX. 

 Form of the Receptacle and Insertion of Floral Organs. 



INSERTION. In botanical language, organs are said to 

 be inserted at the place from which they seem to grow. 

 For instance, in Fig. 156 it will be seen that the pistil is 

 inserted upon, or seems to grow from, the receptacle ; the 

 stamens are inserted upon the corolla ; the corolla is in- 

 4 



