312 rOLYrODIACE.E. 



ti^, pulviiiis stiiiituin iLsc[ue ad 2 mm. altis elevatis squamis dense obtectis ; squa- 

 mLs rliizomatis ovato-lanceolatis 2^ mm. longis 1 mm. latis apice acutis basi 

 rotundatis peltatis basi partibus peltatis margine loLatis casterum eroso-integris. 

 Stipes S cm. longus subteres pliis minus dorso complanatus glaber nitidus cas- 

 taneo-stnimineus. Frons longissime lanceolato-linearis 40 cm. longa stipitem in 

 longitudine 5-plo su]ierans 2cm. lata infra medium latissima sursum longissime 

 attenuata acuminatissima ad acumen lineare 2mm. latum abeuns ad summiim 

 acuta basi gradatim cuneato-attenuata margine subintegra vcl obscm^e iindulata 

 ad marginem subplana, costa medio supra elevata § mm. lata subtus minus 

 elevata; textm-a in exsiccato coriacea in vivo tenuiter coriacea, pagina haud 

 nitida supra ])allido-viridis subtus pallidior in exsiccato fuscens supra glabra 

 subtiV5 subglabra, veuis venulis sub luce transvei-sa anastomosantibns reticulatis. 

 Sori a infra medium frondis usque ad infra acumen utroque latere costa3 1-seria- 

 tim dispositi oTiLingi longiores quam latiores 4 mm. longi 2^ mm. lati, pagina 

 supra ad receiitaculum sori imi)ressa, jjartibus imin-essis ellipticis vel linearibus 

 3mm. longis Imm. latis; reticulis venularmn utraque pagine tenuissime elevatis. 



.Hab. Mt. Arisan, leg. Tajceo Ito et B. Hayata. 3Iart. 1914. 



Whether this species is identical witli P. obscure-vcnulosum or not demands 

 further iuvestigation. 



Polypodium ensatum Tuuxb.; Hookeu et Baker Syn. Fil. p. 361. 



Hab. Arisan : Nimandaira, leg. B. Hatata et Taiveo Ito, Aprili. 1914. 



This fern, though common in Japan, is veiy limited in Formosa. It is 

 foimd only in some high elevations and is rather rare. Tlie Formosau forin 

 lias mnch larger fronds and longer stipes. 



Polypodium ensato-sessilifrons Hayata sp. nov. (Fig. 126-A-B). Ehizo- 

 ma rei^ens subcomplanatum in exsiccato fusco-nigricans apice dense squamatum, 

 squamis rubro-castaneis fascentibiis caudato-ovatis 2 J mm. longis 1 J mm. latis 

 haud cordatis haud peltatis margine erosis vel subintegiis. Stipes brevissimas 

 i-1 cm. longus supra canaliculatus subtiis convexus. Frons subsessilis oblanceo- 

 lata apice acuminata supra medium latissima infra medium angustata deorsmu 

 gradatim attenuata gradatim ad basin decmTens, partibus inferioribus minus 

 quam 1 J cm. latis 5-10 cm. longis. margine plana subintegra vel repanda , 

 textura membrauaceo-chartacea in exsiccato pellucida sujira castanea subtus 



