278 VOL. XXXI. — T. NAKAI : 



In Korea sept. (Kobiarov). 



Kyöng-geui : Ö-ryii-kol Oct. 12, 1900. (T. Uchiyama). 



Hoang-hai : inter Ka-chang-ko-ri et Nani-sh3^öng fl. et fr. sept. 7, 



1902. (T. Uchiyama). 



Distr. regio bor. et temj). Asiae et Europae. 



PotamOgeton longipetiolatuS a. Ca^ius in Notulae Syst. (1909) 85. 



PLyöng-an : Cbinampo Jul. 1906., Phyöng-yang Jul. 1906. (FxVURIe). 

 Planta endetiiica ! Verosimiliter varietas P. fluitantis. 



PotamOgeton Tepperi Bennett in Journ. Bot. XXV (1887) 178 et in Bull. Herb. 

 Boiss, (1896) 518 et in Journ. Linn. Soc. XXXVI. 19G. Graebner Potamog. 62. 

 a. attenUatUS a. Camus in Notulae Syst. (1909) 85. 



Archipelago Koreano : long-reach. (Oldham). 

 Distr. Japonia. 



Potamogeton gramineus l. Sp. pi. (ed. i) 127 (ed. ii) i84. Kunth Enum. pi. 



III. 130. KoRECU. Act. II. Petrop. XII. 39'!. Asciierson et Graebner Syu. Fl. Mittel- 

 europ I. 321. KoM. Fl. Mansh. I. 222. 



P. heterophyllus Schreb. Spicil. Fl. Lips. (1771) 21. Cham, et Schlecut. in Linnaea 

 II. 322. Britton et Brown Fl. North State and Canada I. 69. 



In Korea sept. (Komarov). 



Distr. Europa, Asia et America bor. (Elegio bur. et tern.). 



Potamogeton perfoliatuS L. Sp. pi. (ed. I) 126 (ed. II) 182. Cham, et SCHI.ECHT. 

 in Linnaea IL (1827J 188. Kunth Enum. PI. III. 133. Kocii. Syn. Fl. Germ, et Helv. (ed. 

 ni) 369. IVLvxiM. Prim. Fl. Amur. 267. Britton and Brown Fl. North. States and Canada 

 I. 71. Ascherson et Graebner I.e. I. 313. Kobsch. Act. H. Petrop. XII. 394. Hook. 

 Fl. Brit. Ind. VI. 566. Kom. Fl. Mansh. I. 221. Bennett in Journ. Linn. Soc. XXXVI. 

 196. 



In Korea sept. Flum. Czan-deliingan 10, VIII, 1897. (Komarov). 



Distr. regio bor. et temp, boreali-hemisphaericae et Australia. 



Potamogeton OXyphylluS Miq. in Ann. Mus. Bot. Lugd. Bat. III. 161. Prol. Fl. 

 Jap. 325. Fran, et Sa v. Enum. PI. Jap II. 15. Bennett in Bull. Herb. Boiss. (1896) 

 517 et in Journ. Linn. Soc. XXXVI. 195. Graebner Potamnget 105. 



Korea. (Faurie). 

 Distr. Japonia. 



