LEAVES, BUDS AND FLO WEES 



89 



Each grain of pollen is a single cell, which if fertile 

 (152) contains living protoplasm. The pollen is set 

 free at maturity. / 



FIG. 46. Flower of the pea, 

 Pisum sativum. 



FIG. 47. The same dissected, 

 showing variation in form of 

 the petals. 



144. The pistil. The column-like part in the center 

 of the flower is called the 

 pistil. This also consists of 

 three principal parts, viz., the 

 enlarged flattened summit, 

 called the stigma; the egg- 

 shaped base, called the ovary ; 

 and the slender part connect- 

 ing the two, the style. The 

 ovary contains a smaller, 

 egg-shaped part, called the 

 ovule, which when developed 

 becomes the seed. Many 



FIG. 48. 



FIG. 49. 



flowers have more than one FIG. 48. Stamens (0 and pistil 

 pistil, and many ovaries con- ^ of * he P! a ' .-f *f saiivum : 



r . FIG. 49. Pistil of the same alone. 



tain more than one ovule. 



Recapitulating, the parts of the flower are, in the order 

 we have considered them : 



