XIII. PTERIS. 
193 
mature in July 
when young, a 
only bipinnate.' 
The variety inteyerrima differs only 
and August. The plant has, especially 
strong peculiar odour. Weak plants are 
in the form of 
its pinnules, 
which are not 
pinnatifid or 
sinuated, but 
quite entire or 
with only one 
or two of the 
basal ones 
very slightlv 
lobed. The 
pinnules are 
hence obtusely 
oblong ; and 
each pinnule 
developes a 
distinct mid- 
vein, which 
on either side 
produces a se- 
ries of veins 
that are once 
'or twice 
~*^fl*filW"P forked - Thta 
>aSK^ ft * - 
very different 
aspect from 
the pinnatifid 
form, and ap- 
pears to be 
[Pteris aquilina a 
constant. It 
is, at least, 
not caused by difference of situation, as both occur indis- 
criminately intermixed. 
o 
