THE GREAT GROUPS OF BRYOPIIYTES 



121 



(Fig. 102), the thallus part dying. Sometimes, however, 

 the filamentous protonema is very persistent, and gives rise 

 to a perennial succession of leafy branches. 



Fig. 103. Tip of leafy branch of a moss (.Funana), bearing a cluster of sex organs, 

 showing an old antheridium {A), a yonnger one (7?), some of the curious associated 

 hairs (p), and leaf sections (/).— After Campbell. 



At the summit of the leafy gametophore, either upon 

 the main axis or upon a lateral branch, the antheridia and 

 archegonia are borne (Figs. 83, 103). Often the leaves at 

 the summit become modified in form and arranged to form 



