202 POLYPODIACE.E. 



Hab. Hainan, leg. Z. Katsdmada, 1911. 



Leptocliihis dichotomopMelna Hayata in sched. lierb. Taihoku. 



Near Gymnoptcris iKirialiilis (Bedd. Fern. Brit. lud. t. 272 aud 

 Handb. Fern. Brit. Ind. p. 429, fig. 258), but differs from that by the 

 lanceolate sterile fronds -wliich are in our species much obtuse at the apex and 

 are gradually attenuated towards the base, and by the very short stii>es ; also 

 near Gymnopteris Feei MooRE (Bedd. Feru. South lud. t. 48), but differs from 

 it Ijy the linear fei+ile fronds. Lateral veins in our fern are nearly feathery 

 towards the apex, but usually dichotomously branched downwards. Whether 

 the stipes are articulated to the rhizomes or not is very questiouable. There 

 are seen faiut liues, in which they are articulated, at the very base of the 

 stipes. The Unes, however, are not clear so as to decide the existence of 

 articulation by themselves. 



Hephrolepis Schott. 



Nephrolepis tenuissimum Hatata sp. nov. (Fig. 137). Rhizoma ascen- 

 deus vel subrepeus deusiusoule fohosum, cum reUquis stipitum li cm. iu dia- 

 metro. Stipes basi dilatatus uigricans supra basin sursum castaneo-stramineus 

 basi deusiuscule squamatus sui-sum gradatim glabratus, (squamis nigro-castaneis 

 triangulari-lanceolatis basi \Avls minus rotimdatis margine integris vel 

 obscitre remote dentiusculis apice acuminatis usque 3-4 mm. longis 1-4 mm. 

 latis) usque 10 cm. longus gi-aciUimus erectus supra profimde sulcatus plus 

 minus minute xnlosus vel subglabratus. Frons lanceolata usque 20 cm. 

 louga 5 cm. lata apice tenuissime attenuato-acamiuata (acumiuibus Hueari- 

 bus) l)asi leviter augustior simpliciter pinnata, piunis mediis horizon- 

 taUter patentibus longissimis a se 1 cm. remotis 22 mm. longis 6 mm. latis 

 oblique oblougo-linearibus apice obtusis basi latere superiore auriculato-pro- 

 ductis (auricula triangulari-oblonga latere interiore 8 mm. longa latere exteri- 

 ore 4 mm, longa apice rotundata basi latissima 4 mm. lata margine obscure 

 denticulata) basi latere inferiore cimeato-acutis breve petiolatis (petiolo 1 mm. 

 longo) margine obtuse remoteque obscm-e serrulatis, pinnis inferioribus phis 

 minus reflexis phis minus gradatim brevioribus, infimis 18 mm. lougis, super- 

 ioribus gradatim brevioribus plus minus ascendentibus versus summum ad 

 dentes 3 mm. longos abeuutibus ; rhachis froudis ghiuduloso-hirsuta, piUs uui- 



