FIG. 160. 



THE PISTIL. 

 FIG. 161. 



87 



FIG. 162. 



A Simple Pistil. 



Multiple Pistil. 



Multiple Pistil. 



A SIMPLE PISTIL (Fig. 160) consists of only a sin- 

 gle carpel, and is, of course, apocarpous. 



A MULTIPLE PISTIL (Figs. 161 and 162) consists of 

 several distinct carpels is also apocarpous. 



EXERCISE XXX. 

 The Structure of Ovaries. 



"Whether a pistil is simple, multiple, or compound, 

 each carpel may be looked upon as a single leaf. 

 The simple pistil of the pea, for instance, may be 

 regarded as the blade of a leaf folded at the midrib, 

 so that its inner portion answers to the upper face of 

 a leaf, and its outer portion to the under face. Its 

 dorsal suture will correspond to the midrib, and its 

 ventral suture to the margin of the leaf. 



To make this plainer, take any strong oblong leaf 

 (Fig. 163), and fashion it into a carpel, like the pea- 

 pod, taking the upper part of the leaf for the inner 



