MiYABE AND KuDO : MATERIALS FOB A FlOEA OF HoKKAIDO II. 39 



Later, however, be changed his opinion and treated it as a variety of L. arctica, 

 indorsing the opinion of Nilsson. According to the results of our study on the 

 specimens of the plant under consideration collected in the Northern Kuriles, and 

 also on those of L. arctica, arcuata and confusa, collected in the Tschuktschland 

 and Arctic Alaska by N. Hashimoto^\ we have come to the conclusion, that it 

 would better be treated as an independent species. It is no doubt very similar 

 to L. arctica in its general characters, from which it differs, however, in its 

 stronger stem, fimbriatel ower bract, larger heads and lanceolate i^erianth-segments, 

 which are crenulately denticulate toward the acuminate apes. It is also easily 

 distinguished from L. arcuata l)y its stronger foliaceous stem, and longer and 

 broader lower bract, which is longer than the inflorescence ; and from L. confusa 

 by its inclosed fruit and by the difference in the relative length of stamens and 

 perianth-segments. 



6. Juncus tenuis Willd. in Linn. Spec. PI. 2 (1799) p. 314 ; Britt. & 

 Brown, 111. Fl. 1. p. 386; Fr. Buch. Juncac. p. 115. 



NoM. JAP. Kusa-i. 



Hab. Hokkaido. Prov. Nemuro : Tomoshiri (D. Hoshi V' Aug. 14, 1911). 



DiSTMB. North and KSoutli America, Europe, Australia and Japan (Honsiu 

 and Hokkaido). 



Our plant agrees perfectly with the descriptions of the present species and 

 also with the American specimens. This is the first record of its occurrence in 

 the Flora of Hokkaido. 



7. Juncus papillosus Fr. et Sav. Enum. PI. Jap. 2. (1879) pp. 98, 533. 

 J. niponensis Fr. Buch. Monogr. Jimcac. p. 340 et Juncac. p. 193. — J. mn- 



leUifer Lev'l. et Vnt. Bull. Soc. Bot. Franc. 51 (1904) p. 292, teste Fr. Buch. 



NoM. JAP. Ao-kbgai, Hosoba-kogcnzekishd. 



Hab. Hokkaido. Prov, Oshima : Hakodate (Faime n. 3208, Oct. 18, 1887 ; 

 n. 5236, Sept. 29, 1902).— Prov. Shiribeshi : Otaru (Faurie n. 185, Sept. 1905). 

 — Prov. Ishikari : Sapporo (Faurie n. 3052, Aug. 30, 1888). — Prov. Iburi : Abuta 

 (K. Miyabe !-^^ Aug. 16, 1890) ; Hayakita (Miyabe & S. Arimoto !« Aug. 4, 1902). 

 —Prov. Hidaka : Samani (Y. Tokubuchi !'^ Aug. 22, 1892) ; Aburakoma (Toku- 

 buchi ! Aug. 18, 1892) ; Horoman (Tokubuchi ! Aug. 20, 1892) ; Sarm-u (Toku- 

 buclii! Aug. 12, 1892).— Prov. Kushiro : Sempoji (Miyabe! Aug. 10, 1884); 



