and its Mycorhiza . 
361 
EXPLANATION OF FIGURES IN PLATES 
XIII AND XIV. 
Illustrating Mr. Groom’s paper on Thismia Aseroe (Beccari) and its Mycorhiza. 
Abbreviations. — e.c= exocortex, en.c = endocortex. end. -=endodermis. /./. = 
limiting layer, m.c — mediocortex. p.c — peri cycle, ph — phloem. ph.s = sieve- 
tubes. 
Figs. 1-16. Illustrations of the structure of the thallus, or absorbing organ. 
Fig. t. Showing base of inflorescence-axis (f.a.) X4. 
Fig. 2. Longit. section rendered slightly diagrammatic. (Zeiss A. Oc. 4, then 
reduced to |.) 
Fig. 3. Trans, sect, showing endogenous origin of inflorescence-axis rendered 
slightly diagrammatic. (Zeiss Apo. 16 mm. Comp. Oc. 4.) 
Fig. 4. Longit. median section of growing-point. (Zeiss Apo. 8 mm. Comp. Oc. 
8, then reduced to f.) 
Fig. 5 a. Trans, sect, of central cylinder. (Zeiss D. 3, then reduced to -§-.) 
Fig. 5 b. Trans, sect, of portion of 5 a. (Zeiss D. 3). 
Fig. 6-1 1. Successive stages of development of hyphae in cells of mediocortex : 
longit. sect. (Fig. 9. Zeiss D. 3, all the rest Zeiss T V oil. Oc. 2. ) 
Fig. 12. Cell of exocortex before entrance of hypha : longit. sect. (Zeiss oil. 
Oc. 2.) 
Fig. 13. Ditto shortly after penetration of hypha. (Magn. ditto.) 
Fig. 14. Longit. sect, of 2 cells of exocortex representing the third and fourth 
stages of development of the hyphae. (Zeiss p-% oil. Oc. 2.) 
Fig. 15. Longit. sect, showing a cell of exocortex with hyphae not far from 
maturity, and two cells of the limiting layer representing the third and fourth stages 
of the hyphae. (Zeiss oil. Oc. 2.) 
Fig. 16. Longit. sect, showing the first and second stages of development of the 
hyphae in two cells of the limiting layer. (Magnification ?) 
Fig. 17. Trans, sect, of the central cylinder of the inflorescence-axis. (Zeiss D. 
3, and subsequently reduced to f.) 
Fig. 18. Trans, sect, of part of staminal tube, showing lobes forming an arch 
over a nectary. 
Fig. 19. Whole plant, showing its habit and the substratum of decaying leaves. 
(Nat. size. Drawn by De Alwis.) 
Fig. 20. View of the staminal tube from the outside after the removal of the 
perianth-tube. (Magnified. Drawn by Mr. A. H. Church.) 
