15min. 

 10nim.-> 



2 4 6 8 10 12 2 4 6 8 10 12 

 PM. A.M. 



lOimrL't 

 5mnn. 



■ 



I I 



2 4 6 8 10 12 2 4 6 8 10 12 

 P.M. A.M. 



2 4 6 8 10 12 2 4 6 8 10 12 

 P.M. A.M. 



Fig. 23. Curve of growth of scape of Arisaema triphyllum in dark room at con- 

 stant temperature of 17 to 19° C. Continued from Fig. 22. (See Fig. 24.) 



