“ 
Ss 
XQ 
| 
mH 
eh 
bs 
st 
y 
fy 
ay 
s 
S 
a) 
4S 
8 
&: 
> 
N 
Ss 
my 
Y 
o 
rey 
S) 
S 
a 
Yn 
= 
= 
2 
— 
8 
8 
containing 
chlorophyll, bear- 
not 
ing the sporangia 
at its summit ; 
ba 
fertile green shoot; 
between these a2 
shoot 
these 
sterile green 
(zeduced) ; 
of 
not 
kinds 
three 
do 
shoots 
always occur. 
