As the author thinks that the acquirement of the 

 tropical flora is the most important for the worker of the 

 natural sj'stem of the flowering plants, he has decided to 

 start for Indo-China where he will stay for one year to 

 accomplish his study in the midst of the tropical forests, 

 observing every changing aspect of the flora through all 

 seasons. It is kindly requested that any correspondence 

 regarding this paper on the natural system should be 

 forwarded to the following address : 



B. HAYATA 



Mitsui Bussan Kaisha 

 No. 23, Rue Catinat, 

 Saigon, Cochinchina 



