26 THE SECOND BOOK OF BOTANY. 



When staminate, pistillate, and perfect flowers 

 are all found upon the same plant, it is polygamous. 



Point out upon the charts examples of monoe- 

 cious, dioecious, and polygamous plants. 



Let the pupil answer the following questions con- 

 cerning each flower of his collection : 



Is your flower symmetrical or unsymmetrical ? 



Is it complete or incomplete ? 



Is it dichlamydeous, monochlamydeous, or achla- 

 mydeous ? 



Is it perfect or imperfect ? 



Did it grow upon a monoecious, dioecious, or po- 

 lygamous plant ? 



Monoecious From two Greek words, signifying single and 

 house, having the stamens and pistils in distinct flowers, but 

 both growing upon the same plant. 



Dioecious From two Greek words, signifying two, or double, 

 and house, having the stamens on one plant and the pistil on 

 another. 



Polygamous From two Greek words, polus, many, and 

 gamos, marriage, having both perfect and imperfect, or dicli- 

 nous, flowers. 



EXERCISE VII. 



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 apparently 

 arise. For instance, in Fig. 21 it will be seen that 

 the pistil is inserted upon the receptacle, the stamens 

 are inserted upon the corolla, the corolla is inserted 



