INTRODUCTION 



The present volume contains studies on species and varieties ranging from 

 the Berberideee down to the Polypodiacea?. All the species of Phanerogamous 

 plants are here arranged, as in the preceding volumes, after the system of 

 BENTHAM and HOOKER ; while those of vascular cryptogams are arranged after 

 the system of ENGLEU and PRA.NTL. Of the species and varieties mentioned in 

 this work, 111 are proposed as new species and 17 are regarded as new 

 varieties of known species. No new genus is proposed, but 4 genera are mentioned 

 as new to the flora of the island. The latter genera are as follows : 

 Clcmatoclcttira Stranvacsia 



SjpJtaeranthus Hicracium 



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

 far as is known, is 3458 species and 74 varieties belonging to 1174 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. 



B. ITAYATA. 



October 1918, Taihokit and Tokyo. 



