H INTRODUCTION. 



In the course of my studies since last year, I have found 

 many new species to be added to the flora of Formosa. Among 

 them, the following genera* are new to our flora. 



Captis, represented by C. Morii HAYATA which is related to a Japanese 

 species, C. qu&nquefdia MIQ. 



Madeya, represented by M. cordata R. BE. which is widely distributed 

 through China and Japan, but is rather rare in this island. 



Eutrema, represented by E. Jtedercefdia F. et S. which is peculiar to 

 Japan and Formosa. 



Casearia, represented by C. MerriUi HAYATA, which is related to some 

 Philippine species. The genus is mentioned under the Samydacese in 

 BENTHAM and HOOKER'S fundamental work.** In my opinion, however, it 

 should be referred to the Bixinese, so far as the present plant is concerned, 

 after the limitation of the two families (Samydacese and Bixinese) 

 mentioned in the same work. The genus is referred to the Flacourtiacese 

 Casearieae*** in ENGLEE'S system. 



Salomonia, represented by S. stricta S. et Z. which exists only in 

 Japan and Formosa. 



Melandrium, represented by M. morrisortmontanuiii HAYATA and two 

 other species, all endemic to the island. 



Arenaria, represented by A. petiolata HAYATA which closely resembles 

 A. serpyllifdlia LINN. 



Ryssopteris, represented by a Philippine species, R. Cumingiana A Juss. 



Chisochclon, represented by Ch. Icusulcusensc HAYATA which is closely 

 related to Ch. hongkongensc TUTCHEE. 



Gassine, represented by C. illidifdia HAYATA and two other species, all 

 endemic to Formosa. 



Pygeum, represented by a Philippine species, P. Prcslii MEEE. 



Sangulsorba, represented by S. formosana HAYATA, which is very 

 near to S. officinale LINN. 



Osteorndes, represented by 0. unthyllidifdia LINDL. The species is 

 distributed in Japan, the Boniii, Sandwich, Maiugaia, and Pitcairn Islands. 



* It should be understood that I have not counted in these genera any genus outside of 

 Formosa, though they are mentioned in this work. 



** BENTHAM et HOOKEE, Genera Plantarum I. p. 791. 



*** ENGLEB, A u. GILO. E., Syllabus der Pflanzenfamilien (1912) p. 268. 



