66 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



20 



mm 



lOmm- 

 5mm-- 



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

 P.M. A.M. 



10 mm.--" 

 5mm - 



I I — — I 1- 



-20 



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

 P.M. A.M. 



5 mm-- 



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

 P.M. A.M. 



Fig. 20. Curve of growth of scape of Arisaema triphyllum, March 30 to April 5, 

 1901. (Continued from Fig. 19.) Description on p. 67. 



