326 



REPRODUCTION IN PLANTS 



Fig. 83. — (Edogonium, sexual reproduction. 1. a filament with 

 two enlarged cells containing the female sex-cell or egg. Attached 

 to the .side of the egg are small male plants, which in this species 

 pro<luce the male sex-cells or sperms. 2, 3, 4, show the development 

 of the egg. 5 and 6 show the fertilization of the egg in a plant (Bul- 

 l>ochirta) related to Oedogonuim. 7 shows the development of 

 sperms in an ordinary filament, which in some species of Ocdogonium 

 may also contain egg cells. 8 shows small swimming spores which 

 in this species develop the sort of small male plants seen in fig 1. 



