INTRODUCTION 



Since the publication of " A list of Plants of Formosa " by the lamen[e<l 

 T. KAWAK-Msn, nearly a decade has elapsed. ]lnring this period the Botanical KnrTcy 

 of the Government of Formosa has made considerable progress, and the nximl»r of 

 plants recorded has greatly increased. In his list, Mr. T. Ea\vak.imi enumerated as 

 indigenous to Formosa 2199 species, including flowering plants and higher cryptogams. 

 The sixth vohune of Icones Plantarum Formosanartma just issued, bringing our 

 knowledge up to the present date, gives 3446 as the total number of plants indigenous 

 to the island. Thus, more than one thoiisand species have been added to those 

 enumerated in Mr. KAWAKAin's list. It becomes, therefore, necessjiry for those 

 interested in the study of the flora of the island that another list should be jiublisheil 

 containing all the species of jilants thus far recorded from Formosa. The publication 

 of such a list had been contemplated by Mr. T. Kawakami for some years before his 

 death, and the present Index had alreiuly lieen put into shape by him and other 

 members of the staff of the Botanical Survey. 



In February of this year, I wius sent to the island for collecting, and while there 

 I was asked to complete the manuscrijjt of the Index and to i)ublish it as a supple- 

 ment to Icones Plantarum Formosanaiiun, volume VI. During my stay in Taihoku, 

 I was engaged in preparing the manuscript with the aid of the staff of the Botanical 

 Survey, and after returning home, I continued the work in the Heibarium of Tokyo 

 where it was completed. 



The present Index embraces all the plants recorded in all the literature on tho 

 subject up to the publication of Icones Plantarum Formosanarum, vol. ^'I. and a few 

 newly described species which will be published in the seventh volume of the same 

 work. This Index, as stated above, has been compiled in greater part by the staff 

 of the Botanical Survey ; but corrections of scientific names, ailditions of species and 

 the reading of the proofs have been done entirely by myself. For this reason, I am 

 to be held responsible for all errors which may have crept into the work. 



In conclusion, I much acknowledge my indebtedness to Messrs. Y. SnijtAi>A. 

 F. Hayami, S. Sasaki, T. Ito and S. Fi ju for their faithful and painstaking work 

 in the compilation of this Index. 



B, HAY.VTA. 



December 1916. Taihoku .md Tok-yo. 



