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Bower . — Ophioglossum simplex, Ridley . 
DESCRIPTION OF THE FIGURES IN PLATE XV. 
Illustrating Professor Bower’s paper on Ophioglossum simplex. 
Fig. I. The only specimen available of 0 . simplex , from a drawing by Professor Groom, 
showing the two spike-like appendages, the short stock below, and small root. A. A. and B. B. 
indicate the levels at which sections were taken. Natural size. 
Fig. 2. Base of the specimen on a larger scale after soaking out in water: the course of the 
vascular bundles in the appendages has been traced, x 4. 
Figs. 3-5. Transverse sections of leaf-stalks of 0 . pendulum : Fig. 3, from the base of a sterile 
leaf; Fig. 4, from the base of a fertile leaf ; Fig. 5, higher up on a fertile leaf, x 8. 
Figs. 6-13. Successive transverse sections through the stock of 0 . pendulum , illustrating the 
mode of insertion of the leaf-trace upon the system of the axis, x 4. Whether the leaf be a sterile one 
(as that on the left side of each of these figures) or a fertile one (as were the other two), the strands 
do not coalesce to a single strand before insertion, but remain distinct till they join those of the axis. 
Figs. 14-16. Transverse sections of the leaf of 0 . palmatum , showing the origin of the 
vascular supply to the lowest of its four spikes, x 4. 
Fig. 17. Transverse section of the stalk of that spike. 
Figs. 18-23. Successive sections higher up on the same leaf, showing the origin of the vascular 
supply into the second and third spikes, x 4. 
Fig. 24. Transverse section of the larger appendage of 0 . simplex , at the level A. A. shown in 
Fig. 1. x 8. 
Fig. 25. Transverse section at the level B. B. x 8. 
Fig. 26. Transverse section just above the insertion on the axis, x 8. 
Figs. 27-29. Successive transverse sections of the stock of 0 . simplex showing the insertion of 
the foliar strands upon the system of the axis. It will be seen that the foliar strands do not unite 
into one before insertion on those of the axis, x 8. 
