RECEPTACLE. 187 



An aggregate flower has a common receptacle whose 

 florets are usually on short stalks and are enclosed in 

 a partial calyx and have their anthers separate. The 

 Scabious, well known in the gardens, and the Teasel, 

 whose hooked seeds are employed by clothiers, furnish 

 examples of the aggregate flower. 



The filiform receptacle (rachis) of the Grasses, and 

 the common base to which the scales of the catkin are 

 attached, have been noticed in a former chapter ; and 

 the columnar i eceptacle of the Arum (spadix) furnishes 

 an example of a peculiar variety of inflorescence but 

 not of an aggregate flower. 



