BRYOPHYTA | 381 
of a foot, a stalk, and a sporangium. The last is a complicated 
structure, frequently spoken of as the moss capsule. It resem- 
bles the sporophyte of the Anthocerotales in having assimilating 



| | Ke Oe ) 
1 ey er i 
4 1) iB OR RPK 
{ (] 3 rey || 
1} if ve | i 
\ ) | tet a 
oo he 
\\ 4 oot Te 
() UO mo mY 
: cee: ee 
| | ~ He ota Yj 
) | 7 oe Aa oe A 
Ay Pa a EN 
| 7 et GS aa || | 
\ Me y} eS Nn 
ff ee 
lf) hey | ite \ j 
I ee y 
At @ @ & \\ 4 
LAW OI vs oo 
rT WN YAOR YY TRO AN | 
CAIRN : 
LI\ rN 11) YOY 4 i} 
AMA RAA\YT | Ty gee 
A ANNA Ue 
Fig. 421. Section through a tip of a moss plant, showing location of 
archegonia 
The archegonium on the left has not yet opened ; the one in the center is shown 
in section. (x 80) 
tissue containing chlorophyll and in possessing stomata of the 
type which is found in the Pteridophyta and Spermatophyta. 
Relationship. The mosses are closely related to the liver- 
worts and appear to have been derived from them. While the 
sporophytes of the mosses and the Anthocerotales are very dif- 
ferent in structure, there are similarities which indicate that 
mosses are more closely related to the Anthocerotales than to 
any of the other liverworts. 
