34 



PISTILS AND STAMENS 



ing the ovary and stigma, known as the style. In the pistil of the 



Cherry shown in Figure 35 the parts are indicated. The ovary is 



at 0. The stigma is the expanded surface at st. The style is at s 



and is a stalk-like structure projecting from 



the ovary and supporting the stigma. 



In the Corn the style is extremely long and 

 the stigma branched. {Fig. 36.) In Wheat, 

 Oats, Barley, and Rice there are two very 

 short styles and the stigmas are much 

 branched and plume-like. (Fig. 37.) Styles 

 and stigmas vary much among plants. 



Ovary. — The ovary is the most impor- 

 tant part of the pistil because within it the 

 seeds are produced, and often it makes the 

 edible portion of fruits. 



. Fig. 36. — Pistillate 

 spikelet of Corn, drawn 

 to show the parts of 

 the pistil. A portion 

 of the bracts have 

 been out away to give 

 a view of the ovary. 

 0, ovary, the portion 

 that becomes the ker- 

 nel; s, style; st, stigma. 

 Much enlarged. 



Fig. 37. — Pistil of 

 Wheat and the two 

 lodicules. o, ovary; si, 

 stigmas; s, styles; I, 

 lodicules. Much en- 

 larged. 



Fig. 38. — Cross section 

 of the ovary of a Tomato. 

 0, ovary wall; 6, partition 

 waUs of the ovary; c, locules 

 or cavities in the ovary; d, 

 ovules; p, placentas or parts 

 of the ovary to which the 

 ovules are attached. Much 

 enlarged. 



When the ovary is sectioned so that its interior may be studied, 

 it is seen that it is not a solid body, but consists of a wall 

 enclosing one or more cavities, called locules. {Fig. 38.) In 

 these cavities or locules are the small bodies called ovules, each 

 of which is capable of developing into a seed. Point out the 

 parts of the ovary shown in Figure 38. 



The ovary may contain one locule or many and the number of 

 ovules in a locule also varies in different ovaries. In Beans and 



