MOSSES 



177 



leaves (Fig. 170, B), often called the moss flower. In the 

 center of this rosette there is a group of antheridia and 

 archegonia, sometimes both kinds of organs in a single 

 rosette, sometimes only one kind. 



The antheridia are club-shaped organs containing nu- 

 merous biciliate sperms (Fig. 171, A); and the archegonia 



FIG. 171. Sex-organs of a moss: A, an antheridium discharging a mass of mother- 

 cells (a) containing sperms, and also a single enlarged mother-cell (6) and sperm 

 (c); B, a group of archegonia within a rosette of leaves; C, an archegonium. 

 After SACHS. 



are flask-shaped organs usually with very long necks, and 

 containing a single egg in the bulbous base (Fig. 171, B 

 and C). These sex-organs are exactly like those described 

 for liverworts (93 and 94). It is evident that this leafy 



