I. ] FLO WER-LEA VES. 1 1 



the sheath next to the large petal. Stamens united thus by 

 their filaments into two sets are said to be diadelphoiis. 



Carefully cut away the stamens, and the central organ of 

 the flower, the pistil, remains, corresponding to the pistil of 

 the Orange. Cut across with a sharp knife in its thickest 

 part, you find that it contains but a single cavity, and that 

 the minute rudiments of the future seeds are arranged in a 

 line upon the inner angle of the cavity. These minute rudi- 

 ments of the seeds are called, in their present stage, the 

 ovules, and the hollow leaf which contains and protects 

 them is called a carpellary leaf, or carpel; the lower, 

 hollow part, containing the ovules, being distinguished as 

 the ovary. 



Fig. q. Pistil of Common Pea, enlarged. The minute stigma occupies the 

 outer notch immediately within the apex of the bearded style. 



The carpel is prolonged beyond the ovary into a long, 

 slightly flattened, up-curved tip, bearded with a row of short 

 hairs along its inner face. At the oblique apex immediately 

 beyond the hairs is a minute naked projection, not discer- 

 nible without care, with a soft and cellular surface upon 

 one side. 



This cellular surface is termed the stigma. It is in- 

 variably present, and usually much more conspicuous than 

 it is in the Pea. The stigma does not rest immediately 



