224 THE JOUENAL OF INDIAN BOTANY. 



history of the plant should of course reveal its real nature. Unfor- 

 tunately the seeds are difficult to germinate and require special 

 conditions as shown by Crocker (l). But from the appearance of a germ 

 shoot, Keimpflanze, figured by Goebel (5) it may safely be concluded 

 that the rosettes of bladdered leaves are merely reversion shoots 

 which are exhibited owing to an innate hereditary tendency present 

 in the plant when the maximum facilities for growth are provided. 



In conclusion, I desire to express my sincere thanks to M.R.Ey 

 Rai Bahadur K. Rangachariar Avergal, for suggestive criticism and 

 encouragement during the progress of this work and for ample 

 facilities provided. 



Literature cited. 



1. Crocker, W. Bot. Gaz. Vol. XLIV, 1907, p. 377. 



2. Goebel, K. Organography of Plants, Vol. II. p. 340. 



3. Goebel, K. Pflanzenbiologische Schilderungen, Vol. I, p. 5. 



4. Goebel, K. Pflanzenbiologische Schilderungen, Vol. I, Taf. IX, Fig 3. 



5. Goebel K. Pflanzenbiologisohe Schilderungen, Vol. II, p. 283. 



6. Iljin, W. S. Die Regulierung der Spaltoffnungen in Zusammen hang 



mit der veranderung des Osmotisches Druckes. (Beih. Bot. 

 Centralbl. Bd. XXXII 1914, p. 30.) 



7. Kerner, A. Natural History of Plant, Vol. I, pp 638, 669. 



8. Livingston, B. E. The Roll of Diffusion and Osmosis in-Plants, p. 127. 



9. Palladin, V. I. Plant Physiology Ed. Livingston, p. 242. 



10. Schonland, S. Engl, and Prantl Die Nat. Pfl., Vol. II, p. 73. 



Explanation of Figures opposite. 



1. Large spaces f in the leaf-stalk, bounded by diaphragms, in 

 which lie crystals of Ga. oxalate. 



2. Diaphragm cells in stalk without bladder. 



3. Stamata in leaf with bladder — upper row. 



Do. without bladder — lower row. 



4. Diaphragm cells in stalk with bladder. 



