WMAT IS A FLOWSnf 



133 



ture seeds can be plainly distinguished if the part 

 is held to the light. The mature seed-pod is 

 shown in Fig. 135. This has grown to be so 

 unlike the part o, that it is scarcely recognizable 

 as the same member. It is necessary, therefore, 

 for purposes of definition, to give the part, as it 



Flower of mustard. 



Via. 134. 

 Details of mustard flower. 



stands in the flower, a designative name. It is 

 called the pistil.' 



143. This pistU is plainly of three parts, — the 

 lowest and largest part, which bears the seeds, 

 and which, therefore, we will call the ovary (or 

 "egg- case"); the globular portion at the top, or the 

 stigma (that is, a "mark" or "brand," in reference 

 to its shape) ; the connecting portion, or style 

 (in reference to its slender form). 



144. Surrounding the pistil are six slender 



