MR. L. A. BOODLE ON THE STRUCTURE OF LEAVES 
666 
difficulty in supplying the amount of water required under the 
particular degree of illumination concerned, so that the precise 
yti 
1C 
ratio between supply and loss of water which induces xeroph 
It may possibly be some such factor 
structure was not attained. 
Af git 
as fi z ~ 
325 Za 
} 
AD 
ify 
y 
TE35 
aN 
\ 
<< pie 
7 
1 nat, size. 
Part of leaf from greenhouse. 
he turgescence of the cells of 
the leaf (due to scarcity of water whe 
as strong periodic fluctuations in t 
active) which determines in 
ost 
ion is Mm 
t 
the immature leaf of the bracken 
pira 
n trans 
