70 



MOSSES 



(d) Formation of Stolons. A. branch reclining or trailing 

 on the ground and forming rhizoids and a bud is called a 

 stolon. Stolons develop into erect plants. 



Alternation of Generations is as sharply defined in the 

 mosses as in the liverworts. The life cycle is divided into a 

 permanent gametophyte or sexual generation and a tem- 

 porary sporophyte or asexual generation, both more or less 

 equally conspicuous. 



FIG. 33. Musci. 1, Gametophyte moss plant; 2, plant produced by 

 proliferation; 3, gametophyte with (4) stolon and (5) young gametophyte. 



SUMMARY 



Alternation of generations occurs, as in the hepatics. 

 Gametophyte. The gametophyte, which is the permanent 

 generation, is differentiated into rhizoids, central axis and 



