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 
SASSER 
SS ete 
i 
Fic. 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 (b) and sperm 
(c); B, a group of archegonia within a rosette of leaves; C’, an archegonium.— 
After Sacus. 
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 
