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224 THE JOUENAL OF INDIAN BOTANY. history of the plant should of course reveal its real nature. Unfortunately 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.

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.

1. Large spaces 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.