INTRODUCTION. 



The present volume is the tenth of the series, and the date of its publi- 

 catioii is thc tonth auniversary of the inception of the work which the series 

 describes. It seems, therefore, tliat a few words as to the nature of the whole 

 work and of the results obtained in the course of it, may not be out of phice. 

 The original plan, as explained in the introducfcion to the first vohime, was 

 to pubHsh in a long series, extending it might be over as many as fiffceen 

 years, a flora which should contain full descriptions of all plants found 

 in Formosa. That plan, however, was sh'ghtly altered even in the fii-st 

 volunie, owiug to the necessity of Hmitiug in advance the number of pages so 

 as not to exceed tlie grant made by the Government. That first poi-tiou of 

 the work contiiins an enumeration of plants, with descriptions of new or 

 noteworthy phuits, refersnces to species (as far as iiccessiblo), and a key 

 to the famihes, genera and species with their respective lociilities and geo- 

 grajjhical distributions. It had been my intention to piu-sue this altered plan 

 in the case of the second volume ; but owing to a further reduction of the 

 grant, I was compelled to cut out neiiry aU references to spacies. Descriptions 

 were given only in the case of phmts which were new or of which I had not 

 found iidequate deseriptious. Thus, in the first snd second volumes, I treated 

 all Formosan phints, so far as known to us up to that time, belonging to 

 famihes from the Iljxnunculacege to the Dij)3ace9e. In the third volume, it wiis 

 my desire to treat the remaining famihes so as to complete tlie flora in the 

 rather comjjact form of a conspectus. But, then the new materials with which 

 I liad l)een loaded down since 1910, and especially two coUections made by 

 myself in my two excursions to the island (in 1912) had become so numerous 

 that it had required my whole time to work up even the first parfc of them, and 

 that had compeUed me to put oS, for some years, the continuation of the con- 

 spectus which made up the first and second volumes. Tlie third and foUowing 

 volumes were, therefore, devoted almost exclusively to the results of studies of 

 the materials which had been worked up since 1911. Tliese were given con- 

 tinuously under the headiug, " Contributions to the Mora of Formosa, I. 11. etc." 



The present volume gives the last parfc of the contributions and contains 

 studies on species and varieties ranging from the Violacese down to the Poly- 

 podiaceaB. AU the species of phanerogamous plants are here arranged, as in 

 the preceding volumes, affcer the system of Bentha.m and Hookek, while those 



