Notes. 
161 
Type of Sfele with internal phloem 
alone. 
Fig. 13. 
Fig. 14. 
Type of Stele with internal endo- 
dermis enclosing parenchyma or scler- 
enchyma within the internal phloem. 
Fig. 17. 
Fig. 13. Gleichenia Jlabellata just below node (from Boodle). Fig. 14. Lind- 
saya rigida , internode. Fig. 15. Pteris aquilina. Transitional structure in 
primary stem (from L. du Sablon). Fig. 16. Gleichenia dichotoma just below node 
(from Boodle). Fig. 17. Davallia (Microlepia) pinnata below node. Fig. 18. 
Pteris aquilina. Transitional structure above that of Fig. 7 (from L. du Sablon). 
Phloem diagonally shaded. External limit of endodermis a dotted line. 
M 
