CURVATUEE OF BRYOPHYLLUM CALYCINUM. 343 



Figs. 12 — 15 & 17, 18. Leaves of Bryophyllum- variously isolated 

 and hung with lower part in water showing development 

 at the marginal notches from the submerged parts. 



Nos. 12 & 13. The opposite axillary bud allowed to develope. 



No. 14. The opposite axillary bud removed. 



No. 15. The stem cut in half longitudinally- 



No. 16. Leaf hung dry, no;part submerged. 



No. 17. No part of stem left attached to leaf. 



No. 18. Opposite leaf left attached (but subsequently fell off). 



Plate II 



Figs. 19 — 24. Rooted plants of.Coleus bicolor placed horizontally. 

 Photographed after *a few chays. One or both leaves near 

 the apex or near the base left attached, all others and the 

 terminal bud removed. 



Nos. 25 & 26. No leaves left attached. A lateral bud has deve- 

 loped near the base of No. 26. 



Fig. 27. The method of hanging pieces by three threads, adopt- 

 ed for Nos. 8, 9 & 10. 



