EVOLUTION OF THE LAND PLANT,,, ;*qj 



cells. When fertilisation has been effected the ovum 

 becomes clothed with a cell wall and develops to form the 

 sporocarp. This is a small ovoid body which is 

 formed at the end of a long stalk-like structure 

 which grows out of the archegonium. It re- 

 mains attached in this loose way to the arche- 

 gonium and so appears to grow out of the 



FIG. 38. Section of apex of stem of moss bearing 

 antheridia. 



ordinary moss plant. The sporocarp is rather 

 complex in its structure (Fig. 40). It is not 

 all devoted to the formation of spores, but 

 contains a great deal of nutritive tissue, so 

 that it is capable of living for a long time. In 



,/ IG - p- its lower part it develops some chlorophyll- 

 Moss plant. , . . ,, ,, . r . . r , 



containing cells, so that it can manufacture 

 its own food. The spores are developed in particular 

 bands of cells which arise in the interior and which are 

 usually found in the form of a hollow cylinder surround- 



