271 



ad lobos acuminis abeuntibus, pinnis infimis elongato-triangulari-oblongis cum 

 petiolulis 60 cm. longis 25 cm. latis a medio deorsum asquilatis apice gradatim 

 acuminatis ad summuin acuminatis pinnatis, pinnulis inferioribus lineari-lan- 

 ceolatis 14cm. longis 4 cm. latis a medio deorsum sequilatis apice caudato- 

 acuminatis basi perfecte truncatis latere inferiore latioribus quam latere superiore 

 brevissime petiolulatis (petiolulis 3 mm. longis) deorsum pinnatifidis medio pin- 

 natilobis sursum gradatim denticulatis, segrnentis inferioribus lineari-quadran- 

 gularibus 22 mm. longis 10 mm. latis apice rotundatis vel truncatis margine 

 remote et tenuissime serrulatis vel subintegris 2 mm. a se remotis vel totius- 

 que latis, sinibus inter lobos vel segmentos acuminatis angustissimis medio 1- 

 If mm. latis; pinnis suboppositis a rhachide frondis angulo 45 egressis, pinnulis 

 a rhachide pinnarum angulo 80 egressis, segmentis vel lobis pinnularum a 

 rhachide pinnularum angulo 80 vel 90 egressis ; pinnis inferioribus petiolatis 

 (petiolis 5-3 cm. longis), a se 20 cm. remotis, pin- 

 nulis inferioribus pinnarum inferiorum a se 3- 

 5 cm. remotis ; pagina herbacea membranacea supra 

 glabra subtus ad costas et venas squamis minutis 

 et pilis minutis sparsissime dispersa ; costa supra 

 complanato-elevata utroque latere minute pilosa 

 interrupte alata, alis erectis mm. latis; venis 

 venulis supra tenuiter elevatis, venis venulis supra 

 basi furcato-ramosis, ramis venularum subrectis 

 parallelis ad apicem marginem attingentibus apice 

 elevatis ; costis venis venulis subtus tenuiter elevatis, venulis totis liberis haud 

 anastomosantibus. Frons ad totam paginam sorifera. Sori prope vel versus 

 costas costulas et venulas utroque latere 1-seriatim siti ab apice ab margineque 

 loborum 3-5 mm. distantes oblongo-lineares 3-4 mm. longi f mm. lati. In- 

 dusium inflatum lineari-oblongum sacciforme complete soros involvens. 



HAB. Mt. Arisan : inter Funldko et Taroyen. 



Very near D. costalisorum HAYATA, but distinguishable from it in having 

 nearly entire segments or lobes, which have sori locating in a single series on 

 each side of the costules. In D. costalisorum, the soriferous lobes are usually 

 dentate or lobulate. 



Pig. 1O1, Diplazium in- 

 flatisorum HAYATA; a, a scale 

 on the frond; b, a portion of 

 a pinna. 



