596 fhoday . — Behaviour during Drought of the Leaves of two 
the leaf associated with the bundles, as well as hypodermally between the 
bundles. 
Figs. 8 and 9 illustrate these points. In Fig. 8 the irregular course 
Fig. 8. Hypodermal wandering fibres between two veins. Underlying palisade cells dotted. 
a 
Fig. 9. a-e. Branching hypodermal fibres. 
of the hypodermal fibres is shown, between the bundles from which they 
are wandering in different directions. Part of the palisade tissue is shown 
underlying these fibres. 
It is probable that the fibres sometimes branch. Incipient branching 
is easy to observe (Fig. 9). Clear evidence of both arms continuing 
