POLYPODIACEJE. 



Fig. 160-B, 1), 

 a portion of the frond. 



160 A-B). Rhi/oma repens teres tenuissimura 11 mm. in diametro sqnamatnm. 



Stipes usque 9 cm. longus nitidus fnsco-purpurascens 1 ram. in diametro sectionis 



gracillimus glaber basi squamatus. Frons lancoolata 



apiee acuminatissima (acumine lineari) a medio usque ad 



basi sequilata basi subtrancata usque ad 17 cm. longa 



usque ad 2| cm. lata pinnata, pinnis mediis inferioribus 



subsequilongis, superioribus minoribns versus apicem ad 



deiitem brevem abeuntibus, pinnis inferioribus a se 8 



mm. remotis augulo 50 a rhachibus frondium divari- 



catis oblique rectangularibus 1| cm. longis 4 mm. latis versus apicem obtuso- 



acutis ad summum obtusis ascendentibus basi acuto-cuneatis subsessilibus 



vel brevissime petiolatis valdo inreqnilateralibus, latere superiore basi 6 mm. 



lato, latere inferiore subuullo, margine superiore obscure crenatis rnargino 



inferiore subintegris ; pagina utraque glabra tenuissime membranacea semihya- 



lina. Sori a medio frondis sursam dispositi. 



HAB. Arisan, ad 7000 ped. alt., leg. B. HAY ATA et S. SASAKI, Jan., 1912. 



This fern is of a form so strikingly different from ordinary one of the 

 type. But, the transition from this extreme form to the ordinary one has 

 led me to regard the former as a variety of the latter, or more likely as a 

 mere form of the same species. 



Asplenium viridissimum HAYATA sp. nov. (Fig. 161). Rhizoma? 

 Stipes 40 cm. longus basi parce squamatus purpureo-viridescans superne glabratus 

 subviridescens, squamis angusto-linearibus 13 mm. longis l mm. latis vel 

 valde minoribus et piliformibus. Frons lanceolata 70 cm. longa 35 cm. 

 lata apice acuta vel acuminata basi in ambitu rotundata tripinuati- 

 fida, pinnis inferioribus longissimis, infimis plus minus brevioribus, superi- 

 oribus gradatim minoribus, pinnis longissimis pyramidali-lanceolatis 20 cm. 

 longis 8 cm. latis obliquis (latere supariore latiore basi 6 cm. lato, latere 

 inferiore minus lato 4 cm. lato) basi 10 cm. latis apice acuminatis (acumini- 

 bus pinnarurn linearibus dentatis), pinnis infimis 5| cm. longis 3 cm. latis 

 apice obtuso-acutis pinuatis vel pinnatifidis pyi'amidalibus basi latis- 

 simis petiolulatis (petiolulis 3 mm. longis), pinnulis ordiuis ])rimarii 

 utroque latere pinnae inferioris 6-7, infimis ovatis 18 mm. longis 10 mm. 



