Feb. law.] HA YA TA .—SOME KEENS FROM FORMOSA. 33 



exists in Rishiri in Hokkaido, and is very near to, but quite 

 separable from, the latter. 



PTERis Linn. 



Ptsris biaurita Lixx. var. quadriaurita Retz. ; Matsum. et 

 IIavata, 1. e. p. 019. 



Hab. in monte Morrison, ad 6000 ped. alt., leg. T. Kawa- 

 kami et U. AIori, Oct. 1906, (No. 1867); Shinko : Remogan, leg. 

 T. Kawakami et U. Mori, Jun. 1906, (No. 1392). 



Pteris morrisonicola Hayata sp. nov. stipites longissimi 

 ereeti semiteretes nudissimi fusci hinc canaliculati Iseves. Frondes 

 tripartita; eircumscriptione late ovatae, partibus terminalibus 

 lateralibusque 60 cm. longis tripartitis, segmentis pinnatis, pinnis 

 numerosis suboppositis remotiusculis patentibus lanceolatis apice 

 oblonge acuminatis 15 cm. longis 2 cm. latis sessilibus profunde 

 pinnatifidis, laciniis 1 cm. longis 4 mm. latis oblique patentibus 

 leviter falcatis oblongo-lanceolatis basi latioribus apice oblusis 

 obscure serratis excepte partibus apicalibus soriferis, subcoriaceo- 

 mcmbranaccis. Sori anguste lineares, ad margiuem, non ad 

 apiccm, laciniarum dispositi. 



Hab. in monte Morrison, ad 6500 ped. alt., leg. T. Kawa- 

 kami et r. Mori, Oct. 1906, (No. 1850.) 



Near P. tripartita S\\\; differs from that in having the smaller 

 lobes ol the pinnules and les copiously anastomosing vcinlets. 



Pteris semipinnata Linn. var. dispar Kunze ; Matsdm. et 

 1 Iavata, I. c. p. 622. 



Hab. Bioritsu : Sorozon, leg. T. Kawakami et Q. Mori, fuli. 

 1906, (No. 2403) 



Pteris Wallichiana Agardh ? ; Matsum. e1 Hayata, I.e. p. 

 623. 



Hab. in monte Morrison, ad 6000 ped. alt., leg. T. Kawa- 

 kami c( U. Mori, Od 1906, (No. L872). 



