2 VOL. XXXIV., ART. 2. — G. KOIDZUMI : 



Of tlie genera none is new. On the other hand, of the total 

 number of species twelve are now described for the first time, 

 and four are those which I have before preliminarily described 

 as new species in the Tokyo Botanical Magazine, while thirteen 

 are referable to old species which have hitherto not been credited 

 to the flora of the regions dealt with in this work. 



As to the systematic arrangement of the genera, I have 

 followed chiefly that of Professor E. Koehne^^ in the case of 

 the Poraoideœ, and that of Professor W. O. Focke"^ in the three 

 other subfamilies. In giving generic characters, 1 have limited 

 myself to mentioning only those which can be practically made 

 use of in distinguishing between the genera represented in the 

 regions within the scope of treatment. 



My studies were based principally on the materials preserved 

 in the Herbarium of the Botanical Institute, Science College, 

 Tokyo Imperial University. To Pj-ofessor J. Matsumura of that 

 Institute, I beg herewith to tender my sincere thanks for the 

 facilities afforded me and for the useful advices and criticisms 

 given me during the studies. Thanks are also due to Professor 

 K. Miyabe of Sapporo, to Professor M. Shirai of the Agricul- 

 tural College, Tokyo, and to many others, who all helped me in 

 various ways during the course of the work. 



ROSAGEiE Juss. 



a. L. Jussieu, Gen. PI. (1789) 334 ;— DC. Prodr. II. (1825) 525 ;— Benth. et Hook. 

 Gen. PL I. (1862) 600 ;— Baill. Hist. PI. I. (1867) 346 ;— Focke, in Engl, et Prantl, Nat. 

 Pfl. Fam. III. 3, (1888) 1 ;— Engl. Syllab. Pfl. (1903) 136;— Bessey. Syn. PI. Phyl. (1907) 

 73 ;— Wettst. Handb. Syst. Bot. II. (1903-1908) 355. 



Flores heterochlamydei rarissime monochlamydei ; hermaphro- 

 diti rarissime abortu unisexuales (polygami raro dioeci vel monoeci); 

 actinomorphi rarissime zygomorphi ; tetra vel saepius penta — poly- 

 cyclici ; heteromeri. Calyx persistens (4) — 5 — (7) lobatus, raro 



i> Die naturlichen Pflanzenfamilien III. 3 (1888). 



2) Die Gattungen der Pomaceen, in Wiss. Beil. Progr. Falk-Bealgymn. (1890). 



