INTRODUCTION. 



As was stated in the third volume of this work, several more volumes were 

 to be devoted to the results of studies of new materials which were then on my 

 hands. The first part of these studies was published in Vol. III. under the 

 heading, " Contributions to the Flora of Formosa, Part I." The present 

 volume is principally devoted to the second part of the same studies. It 

 also contains some plants collected during my last excursion to Formosa, in 

 the spring of this year. 



The volume contains 285 species and several varieties, of wliich 167 are 

 proposed as new species, and 9 as new varieties of known species, while 

 118 are identified with species which were known from the island or from 

 other countries. Of genera contained in this volume, one genus, Arisanordds, 

 is proposed as new, and thirteen genera are mentioned as new to the flora 

 of the island. The genera new to our knowledge of the flora are shown in 

 the following list. 



Aconitum Monescs Gryplostylis 



Ailantlms Boschnialda Cystopteris 



Corylopsis Beilsdtmiedia Leucostegia 



Modecca Hydrodiaris 



Cornus Arisanordds 



Genera,* species* and varieties* now to be added to the flora of Formosa 

 number as many as 13 genera, 194 species and 9 varieties. Thus, up to 

 the present date, the total number of species of the flora, so far as is 

 known, is 3112, belonging to 891 genera and 158 families. 



In the present volume, floral sketches of some of my species already 

 described are given, and the original descriptions are repeated, as I 

 desire to give a clear conception of my species to any one who examines 

 them to see whether they are to be recognized as genuine new species or to 

 be reduced to known species. 



Of the species mentioned in this work, I have proposed more than 



* It should be understood that plants outside of the island are not counted in this number, 

 although they are mentioned in this volume. 



