2\2 Groom.- — On Dischidia rafflesianci ( Wall .). 
EXPLANATION OF FIGURES IN PLATE X. 
Illustrating Mr. Groom’s paper on Dischidia rafflesiana. 
rh , root-hairs. ep, epidermis, ex, epidermoidal layer or exodermis, p, passage- 
cells of the epidermoidal layer, sc, sclerenchyma. ck, cork. ph. b, bundles of 
phloem in the central cylinder of the root, s, bark of the supporting tree. 
V, side towards the support. D, side away from the support. 
Fig. i. A pitcher (from alcohol-material) laid open longitudinally, showing the 
one-sided development of the roots, and the solid contents still remaining in the 
pitcher. 
Fig. 2. Transverse section of the region of contact of an attaching-root, showing 
the root-hairs. (Zeiss 3 D. subsequently reduced to one-half.) 
Fig. 3. Semi-diagrammatic longitudinal section through the outer layers of 
a pitcher-root. (Magn. Zeiss 3 D. subsequently reduced to one-half.) 
Fig. 4. Surface section through the inner part of the epidermoidal layer. (Zeiss 
3 D.) This figure explains how it is that in transverse section on each side 
of a passage-cell there is apparently a small narrow cell ; really the two 
apparent cells are the processes of one large cell which partially embraces the 
passage- cells. 
Fig. 5. Transverse section of part of a pitcher-root, showing the striation of the 
external wall of a passage-cell. 
Fig. 6. Surface view of the external wall of a passage-cell. 
Fig. 7. Section showing pits in the external walls of two passage-cells. (Zeiss 
oil immers. oc. 4.) 
Fig. 8. A passage-cell in longitudinal section stained with Gram’s method for 
staining Bacteria. (Zeiss 3^ oil. immers. oc. 8.) 
Fig. 9. Transverse section through an attaching-root, showing dorsiventral 
structure. 
Fig. 10. Transverse section through a pitcher- root showing unilateral develop- 
ment of the root-hairs, and particles clinging to the latter (qlcohol-material.) 
Fig. 11. Transverse section of the central vascular cylinder of an attaching- 
root, showing the dorsiventral structure of the central mass of xylem. 
