70 



Lepigonum hioxpernium Kindb. 



Spe7'gularia media Pers. Syn. PI. I. p. 504, a. heterosperma Fenzl 

 in Ledeb. Fl. Boss. II, p. 168 ; Maxim. Ind. Pekin. in Prim. Fl. Amur, 

 p. 472, et in Mel. Biol. IX. p. 54 ; Franch. PI. David. I. p. 54 ; Forbes 

 et Hemsl. in Journ, Linn. Soc. XXIII. p. 71. 



Hab. Prov. Kitami in Hokkaido : Isl. Kishiri (T. Jlalcino ! Aug. 1903). 



New to the Flora of Japan. It grows among littoral rocks of the 

 island. 



Polygonum (Persicaria) Hydropiper Linn. Sp. PI. p. 361 ; Willd. 

 Sp. PI. II. p. 444, et Enum. PI. Hort. Berol. p. 428 ; Pers. Syn. PI. I. p. 

 440 ; Spreng. Syst. Veg. II. p. 258 ; Meisn. Monogr. Polygon, p. 76, et in 

 DC. Prodr. XIV. p. 109; Engl. Bot. tab. 989; Ait. Hort. Kew. ed. 2, 

 II. p. 418 ; Beiuhb. Fl. Germ. Excurs. p. 571 ; Koch Syn. Fl. Germ. 

 et Helv. ed. 3, p. 535 ; Ledeb. Fl. Alt. TL p. 84, et Fl. Boss. III. p. 

 523 ; Hook. Fl. Bor-Amer. II. p. 132 ; Fr. Schm. in Maxim. Prim. Fl. 

 Amur. p. 230, et Beis. im Amur. u. Ins. Sachal. p. 59 ; Begel Tent. Fl. 

 Ussur. n. 416 ; Hance in Ann. Sc. Nat. 5 Ser. V. p. 240 ; Benth. Fl. 

 Hongk. p. 288, et Handb. Brit. Fl. ed. 5, p. 387; A. Gray Man. Bot. ed. 

 5, p. 416 ; Franch. et Sav. Enum. PI. Jap. I. p. 396 ; Franch. PI. David. 

 I. p. 254 ; Hook. fil. Fl. Brit. Ind. V. p. 39 ; Herd, in Act. Hort. Petrop. 

 XL p. 224 ; Korsh. in Act. Hort. Petrop. XII. p. 382 ; Forbes et Hemsl. 

 in Journ. Linn. Soc. XXVI. p. 341 ; 0. Kuntze Bev. Gen. PI. IL p. 599 ; 

 Henry List PI. Formos. p. 76; Palib. Consp. Fl. Kor. IL p. 34; Diels in 

 Engler's Bot. Jahrb. XXIX. p. 312. 



a. vulgare Meisn. in DC. Prodr. XIV. p. 109, et in Miq. Ann. Mus. 

 Bot. Lugd.-Bat. II. p. 58. 



Hah. Japan, common. 



Sometimes this has the subaquatic habit in Japan. 



forma purpurascens Makino. 



Leaves purpurascent, other as in the type. 



Hab. Prov. Sag ami : Hakone, side of Lake Ashi {T. Makino ! Sept. 

 24, 1886) ; Prov. Tosa : Sakawa, cult. (T. Maldno ! Oct. 1, 1887). 



^. laetevirens Makino in Bot. Mag., Tokyo, X. (1896) p. 64. 



Polygonum Jiaccidum var. ketevirens Makino I.e. VI. (1892) pp. 49, 129. 



Annual, robust, attaining Ira. or more in height. Stem stout, 

 ramose, glabrous, with turgid nodes. Leaves flaccid, shortly petiolate, 

 ovato-lanceolate or oblong-lanceolate, shortly acuminate, obtuse to rounded- 



