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. 



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

 species, C. qucnqucfdia MiQ. 



Maekya, represented by M. cordata R. BR. wliich is widely distributed 

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



Eutrcma, represented by E. Jtedcrcefolia F. et S. which is peculiar to 

 Japan and Formosa. 



Casearia, represented by C. Mcnilli HAYATA, wliich is related to some 

 Philippine species. The genus is mentioned under the Samydaceye in 

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

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

 after the limitation of the two families (Samydacefe and Bixineje) 

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

 Caseariese*** in ENGLER'S system. 



Scdomonta, represented by S. xtrida S. et Z. which exists only in 

 Japan and Formosa. 



Mdcwdrium, represented by M. morrisonmontanum HAYATA and two 

 other species, all endemic to the island. 



Arenaria, represented by A. pdiolota HAYATA which closely resembles 

 A. scrpyllifolia LINN. 



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



Chisoclueton, represented by Git. Iwsukusense HAYATA which is closely 

 related to Ch. liongkmgenae TUTCHER. 



Cossine, represented by C. itticiifdia HAYATA and two other species, all 

 endemic to Formosa. 



Pijfjcum, represented by a Philippine species, P. Prcslii MERR. 



Sanguisorba, represented by >S y . forntosana HAYATA, which is very 

 near to S. officinate LINN. 



Osteomdes, represented by 0. ntkyllidifoU<i LINDL. The species is 

 distributed in Japan, the Bonin, Sandwich, Maingaia, and Pitcairn Islands. 



* It should be uuclerulood that I have not counted ill theso geuera any getms outside of 

 FormosR, though they are mentioned in this work. 



** BEKIHAM et HOOKES, Genera Planhmim I. p. 791. 



*** ENGLEE, A u. GILG. E., Syllabus der Pflanzentamilieii (1912) p. 268. 



