Sykes — The Anatomy and Morphology of Tmesipteris. 89 
Fig. 5. Transverse section of half of a leaf of Tmesipteris tannensis. x 78. 
Fig. 6. Surface view of small piece of epidermis from a leaf of T. tannensis, showing the 
thickening bands on the walls of the epidermal cells, x 400. 
Fig. 7. Transverse section taken half way up a fertile branch (cortex somewhat diagrammatic). 
At a and b are the decurrent bases of the two leaves, each with their two groups of stomata. x 78. 
Fig. 7 b shows some sieve tubes in longitudinal section, drawn from a section of a fertile branch; 
the darkly shaded portions are stained green, while the dotted areas or sieve plates are pink, x 400. 
Fig. 8. Transverse section of fertile branch at the origin of the synangium, passing longitudinally 
through the pedicel of the synangium ; a and b — traces of the two leaves ; the bundle cut 
longitudinally is that supplying the synangium and contains three groups of tracheides surrounded 
by phloem (diagrammatic) ; S — tissue of septum. x 78. 
Fig. 9. Transverse section through synangium pedicel, taken at right angles to Fig. 8, at level 
I showing a single trace. The small-celled tissue is the tissue of the pedicel, while the larger cells 
surrounding it represent the cortex of the branch. x 87. 
Fig. 10. As Fig. 9, but from a section taken at level II in Fig. 8. The single trace has now 
branched into three, x 116. 
Fig. 11. From the same series as Figs. 9 and 10, but at level III in Fig. 8. The middle trace 
has disappeared, and the two lateral ones have diverged to either side of the synangial septum. 
This section passes through the middle of the synangium, in a direction tangential to its pedicel, x 87. 
