Mosses and Lichens 



different plants (dioicous, two households). This 

 m plan is common to many species of mosses, while 



other species have the antheridia 

 and archegonia on the same plant 

 (monoicous, one household). 



duster 

 . second 



. ' * " ) ' " 



lal cluster- 

 jtrst ^jtar. 



^.'\_ .^L- Sperm cell. 



Terminal male *-- 



Female plant. Male plant. flower-cluster. Anlheridtiim bursting and sending 



Polytrichum. Dioicous inflorescence. forth sperm cells. (See page 46.) 



& 



Phascum cuspidatum. Paroicous inflores- 

 cence. Vertical section through stem to 

 show (an) male and (ar) female flowers side 

 by side on the same plant. (i>) Leaf 

 blades, (p) Paraphyses. 



Trematodon ambiguttm. Examples of 

 autoicous inflorescence. Two male 

 clusters and one female cluster. 



