J73 THE BVTANlOAlMAGAZmK. , [Voi. xxv.uo^m. 



This work was carried on under the guidance of Professor 

 Fujn. I wish to express my sincere gratitude for his kind 

 advice and suggestions during the progress of this work, and 

 also to express my hearty appreciations to Messrs. H. Koba- 

 YAsHi, K. Taxiguchi, Y. Takezaki, and Viscount Yonekidzu 

 through whose kindness I could secure the materials for the 

 investigations. 



Botanical Institute, 

 June, 1911. College of Science, 



Imperial University, 

 Tokyo. 



Postscript. 



After the manuscript was finished, and the result of the 

 present investigation was reported in the June meeting of 

 Tokyo Botanical Society, it became known to me that the red 

 sugar corn cultivated in our botanical gardens was produced 

 as the result of breeding made by Dr. Nakai about twelve 

 years ago. It was in his middle school time, and began before 

 the rediscovery of Mendel's laws. Under such condition the 

 result of his experiment was unfortunately not recorded in full. 

 Through his kindness the following account of his experiment 

 was communicated. At first a cross '' Ever Green Sweet," 

 (a white sugar corn) ^ x a yellow pop corn (derived from 

 Liaotung, China) o^ has been made, and he got yellow sugar 

 kernels mixed in mosaic appearance among the kernels of the 

 mother characters. He selected these kernels with mixed 

 character for the further experiments. The next year several 

 plants have been raised from these kernels. On the maturation 

 of the ear he found among them a single plant bearing an ear 

 of the red sugar corn. Near this ])lant there was growing a 

 plant derived from Mita nursery under the name ''King 



