VI.] ABOUT A FERN. 105 
sufficient protection it is densely covered with thick 
brown scales, The point from which a frond is given 
off is called a mode, the space between two nodes 
Wa 
L- 
‘hy 
fxs 
) RYH 
Es 
tH 
= 
SS 
— 
Caw 
SSS 
Fig. 98. 
is an internode, and it will be noted that in the 
Bracken and Polypody these nodes are at irregular 
distances from each other. But if we examine a 
