5 



MATERIALS FOR A FLORA OF HOKKAIDO. V. 



By 

 KiNGO MiYABE 



and 

 YusHUN Kudo. 



:i\: m m. m '^ is^ n v. 



^ §15 ^ ^ :JA,:.. 



Sf- 



Ji m m M 



45. Hydrilla verticillata Royle, 111. Bot. Himal. t. 376 (1839); Caspaiy, 

 in Pringsh. Jahrb. I. p. 494; Hook. f. Fl. Brit. Ind. V. p. 659; Forb. et Hemsl. 

 Ind. Fl. Sin. III. p. i ; Aschers. u. Giirke, in Engl. u. Prantl, Nat. Pfl.-fam. II. i. 

 p. 250. f. 184. a, b ; Korsh. Acta Hort. Peterop. XII, p. 394; Aschers. u. Graebn. 

 Syn. Mitteleurop. Fl. I. p. 398 ; Kawakanii, Bot. Mag. Tokyo XII. p. (225) ; Diels, 

 in Engl. Bot. Jahrb. XXIX. p. 220; Kom. Fl. Mansh. I. p. 237; Matsum. et Ha- 

 yata, Enum. PI. Formos. p. 405 ; Nakai, Fl. Kor. II. p. 216. 



Serpicula verticillata L. f. Suppl. p. 416. — Hydrilla verticillata, var. Roxburghii 

 Casp. 1. c. ; Miq. Prol. I-^l. Jap. p. 159; Fr. et Sav. Enuni. PI. Jap. II. p. 17 ; Ma- 

 tsum. Ind. PI. Jap. II. I. p. 32. — Hydnlla japonica Miq. 1. c; Fr. et Sav. 1. c. p. 18. 



NoM. Jap. Kiironio. 



Hab. Yczo. Prov. Iburi : Lake Osatsu (Y. Tokubuchi ! ^^ 1893). — Prov.Ku - 

 shiro : Lake Akan (P^aurie ! n. 10722, 1893 ; T. Kawakami ! "^ 1897 ; J. Hanzawa!'^^ 

 1904); Lake Toro (J. Hanzawa ! 1904). — Prov. Kitami : Lake Abashiri (Faurie ! 

 1899). 



DiSTRiB. Yezo, Honshfi, Kiushti, Riukiu, Formosa, Korea, Amur-region, 

 Manchuria, China, Tropical Asia, Central Europe, Mauritius, Madagaskar and 

 Australia. 



As to the distribution of the species in the Japanese Archipelago, the Lake 

 Abashiri is probably its northernmost locality. 



46. Vallisneria spiralis L. Spec. PI. ed. r. p. 1015 ; Fr. et Sav. Enum. PI. 



(JAKa.^ «;•«;. 



1) m. J]?,! 7-k '!k EK 2) )\\ _h m »o 3) ^1= n v'a]. 



