HYMENOPHYLL^VCE.E. 257 



bipinnatifida, segmentis I. mediis vel inferioribus longissimis, iufimis Lrevioribus 

 superioribus gradatim brevioribus minoribus, mediis oblongis 3cm. longis l|cm. 

 latis apice obtiisis basi latissimis latere superiore truncatis latero inferiore cunea- 

 tis, segmentis II. infimis mediis obovato-cimeatis apice obtusissimis basi cuneatis 

 S-9mra. longis 5mm. latis pinnatis, lobis lincaribus apice obtusis 3-4mm. longis 

 1 mm. latis; textura tenuissime membranacca glabra semihvalina ; rhachis alata, 

 cura alis 2 mm. lata, alis § mm. latis valde undulato-crispatis ; rbachis segmen- 

 torura I. alata cum alis 2 mm. lata, alis partibus iuferioribus imdulato-crispis ; 

 segmentis inferioribus I. a se circ. 11-2 cm. remotis, segmentis inferioribus II. 

 5-6 mm. a se remotis. Sori ad latus superius partis basilaris segmentorum 

 I. vel II. siti breve stipitati, stipitibiLs apice constrictis ; involucrum perfecte 

 bivalvatum oblongo-rotimdatum margine denticulatum. 



Hiimenophyllum javanicum Hayata Ic. Pl. Formos. IV. p. 141, fig. 81, (non 

 Sprexg). 



Hab. Mt. Arisan, leg. B. Hayata et S. Sasaki ; inter Heishana et Niman- 

 daira, leg. B. Hayata et TaivEO Ito, Mart. 1914. 



Diflers from HymenophyUum javanicum Sprexg by tlie much naiTower and 

 longer fronds -witli sori usually situated at the basal portions of the pinn». 

 Somewhat allied to H. crispatum (Hk. et Grif. t. 77) by the crispate wings of 

 the stijies ; but widely different from it by the U^nceolate fronds with trimcate 

 valves of the involucres. When I found the fern in Januaiy 1912, it was of a 

 rather contracted form, attaining not more than 14 cm. in length ; but in 

 ]\Iarch 1914, I saw the samc fern very mucli elongate, exceeding twice as long 

 as before, but very much naiTowcr. 



Hymenophyllum crispato-alatum Hayata form. remotipinnimi Ehi- 

 zoraa repens graciUimum remotissime frondigerum. Stipes 6-10 cm. longus gra- 

 ciUimus a medio sursum alatus sm-sura cum alis 2mm. latus. Frons lanceolata 

 15cra.-23 cm. longa 3-4 cm. lata apice acuminata basi abrupte truncata apice 

 gi-adatim acuminatissima bi- vel tripinnatifida, segmentis I. mediis longissirais 

 4icm. longis 1 cm. latis lineari-lanceolatis a se IJcm. remotis, segraentis II. 

 oblique obovatis vel linearibiis 7mm. longis latere superiore 1-3-lobatis latere 

 inferiore elobatis, lobis linearibus obtusis 1 mm. latis, segmentis II. a se 5 mm. 

 remotis ; segmentis I. et segmentis II. a rhachibus anguTo 45° agi-essis ; rhachis 



