44 



On the Starch of Ever-green Leaves and its Relation 

 to Carbon Assimilation during the Winter. 



{Preliminary note.) 

 K. Miyake. 



In northern Europe it is generally considered that the green cells of 

 plants cvase to assimilate and become quite free from starch during win- 

 ter. Mer 1} by examining the contents of some ever-green leaves found that 

 the starch disappears at the end of October to reappear again in the coming 

 March. Schulze 2) made more extended study on the reserve materials of 

 ever-green leaves in winter and examined about a hundred species of 



sperms he studied, all were found to 1x3 free from starch, excepting Gndnm 

 gnemon. Among the Angiosperms only Vise tun album and Kmnrijunis jo.j><>- 



Recently Lidforss:> by examining the h-aves of several ever-given plants 



starch during winter. 



to throw some light on the relation of leaf starch to the carbon assimila- 

 tion, I undertook the present investigation by the suggestion of Professor 

 Miyoshi, the work being carried on in the Botanical Laboratory of Tokyo 

 Imperial University from August 1898 till June of the following year. 



By the recent investigations of Meyer, 4 > Schimper, 5 > Brown and Morris, 6) 

 and others it was shown that all of the products of assimilation may not 



