36 



PISTILS AND STAMENS 



Peas, the ovary has one locule enclosing a number of ovules. In 

 A of Figure 39, showing a lengthwise section through the flower 

 of the Pea, one side of the ovary wall is removed to show the 

 locule with its ovules. In this particular flower of the Pea, there 

 are six ovules, but other flowers might have more or fewer. In 

 B of Figure 39 is shown the ovary after it becomes a mature pod. 

 The pod is opened to show the seeds. Each 

 seed is a developed ovule and the pod enclos- 

 ing the seeds is the ovary wall much enlarged. 

 Notice how the ovules and seeds compare in 

 number. 



In Red Clover, shown in Figure Ifl, there is 

 one locule and two ovules. The ovaries of 

 Alfalfa have only one locule, but may have as 

 many as eighteen ovules. 



In the ovary of Corn, Wheat, Oats, and 

 Grasses in general, there is one locule and a 



Fig. 41. — Length- 

 wise section through 

 a young pistil of 

 Corn to show the 

 locule and ovule. 

 a, ovary; s, style; 

 0, ovule consisting 

 of nucellus (ra) and 

 integuments (i); I, 

 locule or cavity in 

 which the ovule is 

 located. Much en- 

 larged. 



Fig. 42. — Lengthwise section through a Tomato 

 flower to show the interior of the ovary, a, ovary; 

 I, looules, represented by dark shading; o, ovules; 

 p, placentas. Much enlarged. 



single large ovule. A lengthwise section through the pistil of 

 Corn is shown in Figure 4I. Notice the ovule at and that it 

 almost fills the locule. 



Tomato ovaries have few or many locules which contain a large 

 number of ovules. Figure Jf2 shows a lengthwise section of a 

 Tomato ovary showing two locules and many ovules. By count- 



