VII.] 



STAMENS. 



89 



17. The petals of a polypetalous corolla, if narrowed to 

 the base like those of the Mustard or Pink, are clawed; the 

 narrow part being the claiv^ the expanded part the lamina. 

 In a gamopetalous corolla, or gamosepalous calyx, the lower 

 united portion is called the tube; the free divisions, which 

 indicate the number of parts cohering, the limb ; the divisions 

 of the limb being spoken of simply as teeth if small, or lobes 

 if larger. The more important forms of the corolla are 

 noticed in Part II. under the groups of plants which are 

 respectively characterised by peculiar modifications of it. 



1 8. The more important of the characters afforded by the 

 STAMENS, due to varying conditions as to cohesion, adhesion. 



Fig. 62. Stamen, 



two celled aiT ^'^' ^3" Staminale and pistillate Flowers of Ricinus ; the 



ther dehiscing stamens polyadelphous, 



longitudinally. 



and suppression, have been already, directly or indirectly, 

 referred to. Some other peculiar modifications which they 

 assume, either in form or in the mode of dehiscence of 

 their anthers, are pointed out in Part II. as occasion arises. 



