346 POLYPODIACE^E. 



Frons fertilis : quam ea sterilis minor conformis vel angustior pinnis longissime 

 linearibus chartaceis ; segmenta pinnarum vel frondum margine toto longitudine 

 sorifera. Indusium marginale tenuissime membranaceuin Imin. latum. 



HAB. Mt. Arisan, Taroyen, leg. TAKEO ITO, Aprili. 1914. 



Vittaria SM. 



Vittaria sp. No. I. (Fig. 149-a). Epiphytica ad truncos arboris crescens. 

 Khizoma dense squamatum dense frondigerum, squamis castaneo-fuscentibus 

 4-6 mm. longis basi J mm. latis linearibus basi latissimis J mm. latis apice 

 subulato-acuminatis margine remote setulosis. Stipes supra subnullus subtus 

 complanatus basi squamatus. Frons longissime linearis usque ad 30cm. longa 

 usque ad 3 mm. lata apice acurninatissima basi gradatim attenuata glabra mar- 

 gine integra margine baud vel vix recurva glabra. Textura chartaceo-coriacea, 

 costa supra vix vel distincte elevata subtus plana baud elevata vel plus minus 

 impressa. Sori ad sulcos marginales siti. 



HAB. Shinko : Mai, leg. U. MORI, Juli. 1906 (No. 1322). 



Very near V. elongata Sw.; but differs from it by the much smaller fronds 

 with elevated costee. Color and cellular structure of the scales are also different. 



Vittaria arisanens HAYATA (Fig. 149-b, c) Ic. PL Formos. IV. p. 243, 

 fig. 169. Descriptio auctata : Squamae apicis rhizomatis lineari-lanceolataa 5- 

 8 mm. longre ^-1 mm. lataa apice acuminatissimaa basi baud contracts haud 

 nigricantes tenuissimse fusco-castaneaa. 



Vittaria sp. No. II. (Fig. 149-d, e, f ). Epiphytica ad truncos arboris 

 crescens. Rhizoma dense squamatum et dense frondigerum, squamis fuscentibus 

 lineari-lanceolatis cum iis Vittarice suberectce conformibus paullo majoribus. 

 Stipes basi dense squamato excepto glaber brevis subtetragonus. Frons longe 

 linearis 35cui. longa 6mm. lata apice acuminatissima basi gradatim attenuata 

 ad stipitem brevem abeuns glabra. Textura tenuiter coriacea. Sori intramar- 

 ginales, marginibus valde deorsum curvatis. 



HAB. inter Urai et Raga, leg. K. MIYAKE, Oct. 1899. 



Near Vittaria suberecta HAYATA, but distinguishable from it by the thinner 

 fronds with much more recurved margins. 



Vittaria mediosora HAYATA sp. nov. (Fig. 149-g, h, i). Epiphytica. Rhi- 

 zoma dense squamatum dense frondigerum ; squamis caducissimis fuscentibus 



