INTRODUCTION 



Tlic ])roseiit voliiino C(iiitiiiii.s studies on species aud varietios raugin^- from 

 tlic Berbevidcto dowii to tlio Pi^lypodiacea». AU tlio species of Phanerogamous 

 plants avo hcvc avvangod, as iii tho pvcceding volumcs, after thc sj-stem of 

 Bentham and PIookrr ; whih' thosc of vasculav crvptogams ave avvanged aftev 

 the system of ENor.Kii aud Piianti,. Of tlio species and vavieties mentioncd in 

 tliis wovk, 111 aro i^roposed as now s}»ocics and 17 ave vegavded as ncw 

 vavieties of kiiowii si^ocios. No new gouus is jaoposod, Lut 4 genera avc mentioncd 

 as ncw to tlio flova of tho isknd. Tho lattor goiiora aro as follows : — 

 Clematoclcthra Stra nvacsia 



SjjJiaeranthus Illcracmm 



Thus, u]) to tlio prosclit date, the total numbor of spocies of the flora, so 

 far as is kuow u, is 3458 s]»ocios and 74 varictics belonging to 1174 geneva and 

 1G9 fiimilies. 



Finally, I avail mysolf of this oppovtimity to tender my lieavty thanlcs to 

 the officials of the Govevnraent of Formosa, to whom I am much indobted 

 for hrl]) in tlic collection of inatcvial and in tlic publication of this wovk. 



B. HAYATA. 



Octobor 1918, Taihokii aud Tnkyo. 



