INTRODUCTION. 



The present volume contains studies on species and varieties ranging 

 from the Kauuuculacene down to the Aroidese. All the species of Phanero- 

 gamous plants are here arranged, as in the preceding volumes, after the 

 system of BENTHAM and HOOKER. Of the species and varieties mentioned in 

 tliis work, 139 are proposed as new species and 4 are regarded as new 

 varieties of known species. Two new genera Dolichovigna and Pseudosmilax 

 are proposed as new, while nine genera are mentioned as new to the flora 

 of the island. The latter genera are as follows : 



Reevesia Anotls Agyneia 



Phellodendron Mimulus Alchornm 



Filipendula Siphonostegia Orchis 



Thus, up to the present date, the total number of species of the flora, so 

 far as is known, is 3,608 and 78 varieties belonging to 1,185 genera and 

 169 families. 



Finally, I avail myself of this opportunity to tender my hearty thanks 

 to the officials of the Government of Formosa, to whom I am much indebted 

 for help in the collection of material and in the publication of this work. 



BUNZO HAYATA. 

 .October 1919, Taihoku and Tokyo. 



