POLYPODIACHaE. 245 



reflexis brevioribns 4 cm. loiigis ; costis segmentorum supra |plano-elevatis, 

 subtus acuto-elevatis ; areolis costalibns secus rhachin frondis linearibus mediis 

 l cm. longis l mm. latis ; costis venis venulisque titraque pagine distincte 

 nigro-coloratis ; pagina supra glabra subtus ad costas venasque sub lente 

 minute parcissime squamata vel demum glabrata. Textura membranacea. 

 Sori dorso ad paginam superiorem elevati, partibus elevatis rotundatis medio 

 umbonato-impressis. 



HAB. Arisan, ad 8000-7000 ped. alt., leg. B. HAYATA et S. SASAKI, 

 Jan., 1912. 



Near Poly podium formosanum BAKER, but differs from it by the more 

 acuminate pinna) which are more or less ascending, but not quite horizontally 

 arranged like those of P. formosanum. Also near P. amcenum WALL.= 

 Goniophlebium amcemim J. SM. (BEDD. Fern. Brit. Ind. t. 5), but distinguish- 

 able from it by the quite naked fronds with much longer linear terminal lobes. 



Polypodium decrescens CHBIST (Fig. 171) var. blechnifrons n. v. 

 Hhizoma repens teres tenue minus 1 mm. crassum dense squamatum dense 

 radicans dense foliosum, squamis fusco-castaneis tenuissimis lanceolatis 4 mm. 

 longis f mm. latis apice acuminatis basi rotundatis subcordatis non peltatis. 

 Stipes brevis usque 1 cm. longus semiteres supra (intus) planus densiuscule pilis 

 horizontaliter pateutibus obtectus, pilis 1-seriatim pluricellularibus castaneo- 

 rubescentibus 1^ mm. longis apice clavatis, prseterea pilis brevissimis 2- 

 cellularibus apice clavatis latioribus parce dispersus. Frons lanceolata vel 

 oblongo-lanceolata 13 cm. longa 3 cm. lata apice acuta vel caudato-acuminata 

 (caudis h'nearibus 2|- cm. longis 2-| mm. latis ad summum obtusis) vel ecaudata 

 simpliciter acuta basi subito cuneata attenuata lineari-attenuata- ad stipitem 

 1 cm. longum abeuns, (partibus attenuatis 4-|- cm. longis sursum 1 cm. latis 

 deorsum 1| -1mm. latis rnargine undulato-repandis, undulis gradatim minori- 

 bus demum ad nullum abeuntibus, undulis superioribus triangularibus 4 mm. 

 latis 2 mm. longis apice obtuso-rotundatis), partibus principalibus (partibus 

 frondis exceptis partibus attenuatis et caudis) toto circ. ad x rhachin 

 pinnatifidis, segmentis linearibus rectis circ. angulo 50-60 a rhachibus frondis 

 egressis versus apicem angustioribus ad summum obtusis deorsum latioribus 

 ad basin plus minus dilatatis, mediis 13 mm. longis basi 3-4 mm. latis a se (a 



