Hymenophyllaceae , Schizaeaceae and Gleicheniaceae . 5 1 5 
2. Endodermal pockets. These are formed in connexion 
with some of the leaf-traces. One is seen in the transverse 
sections of the node represented by diagrams A-D in Fig. 25, 
which are arranged in acropetal order. In A two small 
endodermal pockets are shown cut transversely (^). They 
Fig. 25. — Schizaea dichotoma. A , B , C, and D, diagrams showing endodermal 
pocket (<? L ) connected with departing leaf-trace. Position of sclerotic tissue shown 
by dotted area. E, stele showing internal tracheides (iJ.) and internal endoder- 
mis ( \i.e .) ; s.c., two sclerotic elements. F, stele showing internal tracheides (i.t .) , 
nodal endodermal pocket (e x ) and probably a second pocket ( e . 2 ). All x 
about 23. 
soon fuse to form one, two stages of the fusion being shown 
by diagrams B and C. In C the mass of xylem belonging 
to the leaf-trace has become detached, while in D it has 
moved further outwards, and the endodermal pocket has 
N n 
