TERMS USED IN DESCRIBING THE FLOWER 185 



or cohesion is of importance. When the stamens are distinct 

 or separate they are said to be free, as in the Buttercup and 

 Rock Cress. If there are four stamens and two of them are 

 short and two long, they are didynamoits, as in the Deadnettle 



FIG. 198. Section FIG. 199. Section 



of flower to show of flower to show 



didynamous sta- tetradynamous 



mens. stamens. 



FIG. 200. 



Monadelphous 



stamens. 



and Foxglove. In the Wallflower there are six stamens ; two are 

 short and four long. They are said to be tetradynamous, 



If the filaments are united they may be : 



Monadelphous, all in one bundle, as in the Laburnum. 



Diadelphous, in two bundles, as in the Pea. 



Polyadelphous, several bundles of united filaments, as in the 

 St. John's Wort. 



Syngenesious, when the stamens are united by their anthers, 

 as in the Daisy and Dandelion. 



The adhesion of the stamens must be 

 described in the following terms : 



Hypogynous, when they spring from 

 beneath the pistil, as in the Buttercup, 

 Wallflower, and Stitchwort. 



Perigynous, when they are inserted on 

 the calyx, as in the Pea, Rose, and Apple. 



Epigynous, when inserted on the top of 

 the ovary, as in the Fool's Parsley and 

 Hemlock. 



Epipetalous, when united to the corolla, as in the Primrose, 

 Mint, and Borage. 



Gynandrous, when the stamens are joined to the pistil, as in 

 the Spotted Orchis. 



FIG. 202. Polyadelphous 

 stamens. 



