78 THE PISTIL. [CHAP. 



Some other peculiar modifications which the anthers 

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

 are pointed out in Part II. as occasion arises. 



20. The PISTIL consists of one or more carpels : if 

 of two or more they may be separate or more or less 



FIG. 50. Pod (legume) of Pea, partially laid open to show the attachment 

 of the seeds to the ventral suture. 



coherent, free from the calyx- tube, or more or less 

 adherent to it. Take a pistil of the simplest possible 

 structure, the pistil of the Pea or Bean, for example. 

 You have an apocarpous pistil, consisting of a single 

 carpel. Buttercup also has an apocarpous pistil, con- 

 sisting, however, not of a single carpel, but of numerous 

 carpels. 



A comparison of any one of the carpels of the Butter- 

 cup with the pistil of the Pea will afford satisfactory 



FIG. 51. Longitudinal section of a fruit-carpel of Buttercup, showing 

 the remains of the oblique stigma. 



evidence that in the latter you have but a solitary carpel. 

 In Buttercup you observe that the stigmas are all oblique 



