26 '^: in^.X if«-^b r^ iE a J}^ ,£v n VIII. 



on the rocky sumniit of Mt. Kanuii, in the Ishuicl of Okushiri, growing together 

 with lichens and mosses. Tlie plant is said to grow also on the rock)' cliffs near 

 Tsurikake and some other places in the same island. 



The Island Okushiri, h)athed b\' a warm branch current of the Kuroshiwo, has 

 a mild climate. As a consequence, among its llora, we find many interesting 

 southern elements, wnich are either very rare or entirely unknown in the main- 

 land of Hokkaido. As examples, we may cite Cymbidiuni virens Lindl., Lonicera 

 stropkiopkora Franch., Dfyopteris Incera O. K. var. snbtripartita Miyabe & Kudo, 

 and Ardisia japonica Bl. 



106. Cyperus difformis L- Spec. PI. ed. 2. p. 61 ; Kunth, Enum. PI. II. p. 

 38; Ledeb. Fl. Ross. IV. p. 242; Maxim. Prim. Fl. p. 297; Rgl. Tent. PT Ussur. 

 p. 159; Miq. Prol. Fl. Jap. p. 73; Fr. et Sav. P2num. PI. Jap. II. p. 104; Clarke, 

 in Hook. f. Fl. Brit. Ind. VI. p. 599 et Forb. et Hemsl. Ind. Fl. Sin. III. p. 210; 

 Kom. PI. Mansh. I. p. 331 ; Matsum. Ind. PI. Jap. II. 1. p. 140; Nakai, P'l. Korea. 

 II. p. 286 et Bot. Mag. Tokyo XXVI. p. 190. 



Cyperus Goeriiigii Steud. Syn. II. p. 24. 



NoM. Jap. Tania-gayatsuri. 



Hab. Hokkaido. Prov. Ishikari : Teine (K. Kondo ! '^ Sept. 26, 1906); Has- • 

 sabu (M. Takenouchi ! June 7, 19 17). 



DiSTRiB. Hokkaidd, Honshia, Kiushia, Formosa, Korea and widel)' dis- 

 tributed throughout tropical and temperate regions of Asia, Europe and Africa. 



107. Juncellus serotinus C. B. Clarke, in Hook. f. Fl. Brit. Ind. VI. p. 

 594 et P'orb. & Hemsl. Ind. Fl. Sin. III. p. 208; Matsum. Ind. PI. Jap. II. I. p. 

 154; Nakai, Fl. Korea. II. p. 286 et Bot. Mag. Tokyo XXVI. p. 199. 



Cyperus serotinus Kottb. Desc. et Ic. Gram. p. 31 ; Kunth, Enum. II. p. 19; 

 Diels, Fl, C. China, p. 227; Kom. Fl. Mansh. I. p. 332. 



Cyperus Japonic us Miq. Prol. Fl. Jap. p. 72 ; Fr. ct Sav. Enum. PI. Ja[). II. 103. 



Cyperus serotinus Rottb. var. dcpauperata Fr. et Sav. /. c. p. 102. 



NoM. Jap. Mi.':;u-gayatsuri, Uslii-gayatsuri. 



Hab. Hokkaido. Prov. Shiribeshi : Yoichi (Y. Tokubuchi ! Aug. 7, 1894); 

 Zenibako (Y. Tokubuchi! Sept. 15, 1869). — Prov. Ishikari : Sapporo (S. Tanou- 

 i'j; m ^ Z5- 



