367 
Kendrickia Walkeri, Hook, f 
together with the separation of the rows of tracheids by the parenchyma- 
cells cutting a path for themselves, seem to be without parallel in the, as 
yet, described Anatomy of Plants. 
EXPLANATION OF FIGURES IN PLATE XXXI. 
Illustrating Miss Clark’s paper on Kendrickia Walkeri. 
Fig. 1. Transverse section of a young stem of Kendrickia Walkeri. M =* pith; int.ph. 
= internal phloem ; xy = xylem ; c = cambium ; ext. ph. — external phloem ; K — cortex ; 
P = commencing periderm formation, x 1 80. 
Fig. 2. Transverse section of a slightly older stem showing commencing wedge formation. 
X 120. 
Fig. 3. Longitudinal radial section at the margin of a wedge, x 120. 
Fig. 4. Tangential section of the same. X 120. 
Fig. 5. Patch of xylem-cells with large intercellular spaces, x 180. 
Fig. 6. Beginning of tylosis, a = parenchyma-cell ; b — vessel, x 180. 
Fig. 7. Transverse section showing early stage of splitting of the axial woody ring, a =» central 
margin of wedge ; b = parenchymatous patch, x 1 20. 
Fig. 8. Ditto, at a slightly older stage, a = wedge ; b = patch ; c = pith ; d = cell from 
which the ingrowth has mainly taken place ; e =» only tracheid of a row which has escaped 
destruction, x 120. 
Fig. 9. Ditto, at the margin of the ingrowth, a = parenchymatous cell, x 120. 
Fig. 10. Ditto, a-a = parenchymatous cells ; b and c = tracheids filled with tylosed cells, 
x 120. 
Fig. 11. Ditto, at a fairly old stage, a — wedge ; b = isolated tracheid ; c — pith ; d — a split 
or gap in the tissue; T — isolated row of tracheids. x 120. 
Fig. 12. Ditto, a = wedge ; b — sclerotic cells; ^ = pith ; d = vessel filled with tylosed 
cells, x 120. 
Fig. 13. Longitudinal radial section at the margin of the ingrowth, a — cells at the margin of 
the wedge ; b *= cavity of a vessel ; c = a tylosed cell which has developed into a sclerotic cell ; 
d = a tylosed parenchyma-cell, x 120. 
Fig. 14. Transverse section of the old stem showing a separated portion of the axial woody 
ring embedded in dilatation-parenchyma. The arrow represents the direction taken by the ingrowth. 
a — wedge side ; c = pith side, x 80. 
Fig. 15. Photograph of the cut surface of the stem. The faint shading connecting two of the 
wedges through the pith indicates the position of the first ingrowth, x §. 
Fig. 16. Ditto. Showing slightly different configuration of the wood, x 
Fig. 17. Ditto, of old stem, x 3. 
