BOTAJflCAL OOXSIDliRATIOSS. 



11 



in shape (Figs. 6 and -j), and when the proper 

 time arrives is most abundant, more so than 

 with any other plant of which we know. The 

 pollens have a diameter of 20 micro-millimeters, 

 but in some cases this may be from 13.3 to 

 25.8 m. m. The exterior surface of these granules is 



=vi; 



Fig. s. Flowers at various stages of maturity. 



smooth, with about thirty-five pores, which have special 

 function during the fertilization of the ovum. The pis- 

 til is advantageously placed to receive the pollen on 

 top of the style (Fig 8, /), called stigma. The pistil 

 consists, as it were, of three small leaves, or carpels; 

 these communicate with the ovarv. There is onlv one 



Fig. n. Stamens (detail of aiitliers). 

 liaek view. Front view. Section. 



ovum in each ovary. The fruit, so-called, when only 

 casually examined seems one. but closer observation' 

 shows it to be several distinct seeds, which in number 



