INTRODUCTION. 



As was statecl iu the tliird vulume of tliis work, S3veral luore volumes were 

 to be devoted to tLe results of studies of uew materials wliicli were tben ou. my 

 liands. Tlie first part of these studies was published in Vol. HI. under the 

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

 volume is jDrincipally devoted to the second jaart of the same studies. It 

 also contains some plants eoUected during my last excm-sion to Formosa, in 

 the spring of this year. 



The volume contains 285 speeies and several varieties, of which 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 couutries. Of genera contaiued iu tliis vohime, oue geuus, ArisanorcJiis, 

 is proposed as new, aud tliirteeu geuera are mentioned as new to the flora 

 of the islaud. The genera new to our knowledge of the flora are shown iu 

 the following hst. 



Acoidtum Monescs Crijplostylis 



Ailanthus Boschnialda Gijstcypleris 



Corijlopsis Beilschmiedia Leucostegia 



3Iodecca Ht/drocJiaris 



Cornns Arisanorchis 



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

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

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

 kuown, is 3112, belougiug to 891 genem and 158 families. 



In the presei t volume, floral sketches of some of my species akeady 

 described are gi\eu, aud 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 fcj 

 be reduced to known species. 



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



* It should be unrlerstood that plants outsiJe of the island are not coiiuted in this number, 

 although they are mentioned in this volume. 



