Boodle . — Anatomy of the Gleicheniaceae . 747 
Figs. 20-23. Gleichenia dicarpa , rhizome. Diagrams of the stele in a series of 
sections through the node. All x 30. 
Fig. 24. Gleichenia pectinata , rhizome. Transverse section of stele. The 
central sclerenchyma has dropped out. x about 18. 
Fig. 25. Gleichenia pectinata , rhizome. Diagram of transverse section of stele. 
X 30. 
Fig. 26. Gleichenia pectinata , rhizome. Transverse section of stele at the node. 
Leaf-trace preparing to separate, x 15. 
Fig. 27. Gleichenia pectinata , rhizome. Transverse section of node. The leaf- 
trace has become free. x about 6. 
Fig. 28. Gleichenia pectinata. Part of a scalariform tracheide from the 
rhizome, x 390. 
Fig. 29. Gleichenia circinata , var. microphylla, root. Transverse section. Only- 
one of the four phloem-groups is shown, y.t., incompletely differentiated 
tracheides. x 390. 
Fig. 30. Platyzoma microphyllum. Diagram of transverse 'section of rhizome. 
Phloem not represented. Leaf-traces shown in the right-hand part of the cortex 
only, x 7. 
Fig. 31. Platyzoma microphyllum , rhizome. Diagram of transverse section 
of stele, x 30. 
Fig. 32. Platyzoma microphyllum , rhizome. Transverse section of about half 
the stele, x 45. 
Fig. 33- Platyzoma microphyllum , rhizome. Transverse section, showing leaf- 
trace separating from stele, p.r ., parenchymatous ray. x 145. 
Fig. 34. Platyzoma microphyllum , rhizome. Transverse section, showing leaf- 
trace free, x 145. 
Fig. 35. Platyzoma microphyllum. Diagram of transverse section of petiolar 
bundle, x 90. 
