POLYPODIACE.E. 245 



reflexis brevioribus 4-|- cm. longis ; costis segmeutorum supra Jplauo-elevatis, 

 stibtus acuto-elevatis ; areolis costalibus secus rhacliin frondis linearibus mediis 

 1^ cm. longis 1^ mm. latis ; costis venis venulisque ntraqne pagine distincte 

 nigro-coloratis ; pagina supra glabra subtus ad costas veuasque sub lento 

 minute parcissime squamata vel demum glabrata. Textiuva membranacea. 

 Sori dorso ad paginam superiorem elevati, partibus olevatis rotundatis medio 

 nmbonato-impressis. 



HAB. Arisan, ad 8000-7000 ped. alt., leg. B. HAY ATA et 8. SASAKI, 

 Jan., 1012. 



Near Polypodiiim formosanum BAKER, but differs from it by the more 

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

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

 Gonioplilebhim ammtimi 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 CHRIST (Fig. 171) var. blechnifrons n. v. 

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

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

 lougis J mm. latis apice acuminatis basi rotundatis subcordatis non peltatis. 

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

 horizontaliter pateiitibus obtectus, pilis 1-seriatim pluricellularibus castaneo- 

 rubescentibus 1| mm. longis apice clavatis, prgeterea pih's brevissimis 2- 

 cellularibus apice clavatis latioribus parce dispersus. Frons lanceolata vel 

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

 (caudis liuearibus 2.1 cm. longis 2-J- mm. latis ad summum obtusis) vel ecaudata 

 simpliciter acuta basi subito cuneata attenuata liueari-attenuata ad stipitem 

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

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

 bus demum ad nullum abeuntibus, undulis superioribns triaugularibus 4 mm. 

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

 frondis exceptis partibus attenuatis et caudis) toto circ. ad rhachiu 

 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 



