SPERMATOPHYTES: ANGIOSPERMS 375 



velops the pollen-tube, which penetrates the style to reach 

 the ovary cavity which contains the ovules (megasporangia). 

 The impossibility of contact between pollen and ovule im- 

 plies inclosed ovules and hence seeds, and therefore the 

 name " Angiosperm." 



(2) The female gametophyte is but slightly developed 

 before fertilization, the egg appearing very early. 



(3) The female gametophyte produces no archegonia, 

 but a single naked egg. 



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