HYMEKOPHYLLACE.E. 257 



bipinnatifida, segmentis I. mediis vel inferioribus longissimis, infimis brevioribus 

 superioribus gradatini brevioribus minoribus, mediis oblongis 3cm. longis l^crn. 

 latis apice obtusis basi latissimis latere stiperiore truncatis latere inferiore cunea- 

 tis, seginentis II. infirnis mediis obovato-cuneatis apice obtusissimis basi cuneatis 

 8-9 mm. longis 5inm. latis pinnatis, lobis linearibus apice obtusis 3-4 mm. longis 

 1mm. latis; textura tenuissime menibranacea glabra sernihyalina ; rliacbis alata, 

 cum alis 2 mm. lata, alis mm. latis valde undulato-crispatis ; rhachis segmen- 

 torum I. alata cum alis 2 mm. lata, alis partibus inferioribus undulato-crispis ; 

 segmentis inferioribus I. a se circ. 1^-2 cm. rernotis, segmentis inferioribus II. 

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

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

 bivalvatum oblougo-rotuudatum margine denticulatum. 



Hymenopliyllumjavanicum HAYATA Ic. PL Formos. IV. p. 141, fig. 81, (non 

 SPRENG). 



HAB. Mt. Arisau, leg. B. HAYATA et S. SASAKI ; inter Heishana et Niinan- 

 daira, leg. B. HAYATA et TAKEO ITO, Mart. 1914. 



Differs from Hymenopliyllum javanicum SPRENG by the mucli narrower and 

 longer fronds with sori usually situated at the basal portions of the pinnse. 

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

 the stipes ; but widely different from it by the lanceolate fronds with truncate 

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

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

 March 1914, I saw the same fern very much elongate, exceeding twice as long- 

 as before, but very much narrower. 



Hymenophyllum crispato-alatum HAYATA form, remotipinnum Ehi- 

 zorna repens gracillimum remotissime frondigerum. Stipes 6-10 cm. longus gra- 

 cillimus a medio sursum alatus sursurn cum alis 2 rnrn. latus. Frons lanceolata 

 15cm.-23cni. longa 3-4 cm. lata apice acurninata basi abrupte truncata apice 

 gradatini acuminatissima bi vel tripinnatifida, segmentis I. mediis longissimis 

 4J cm. longis 1 cm. latis lineari-lanceolatis a se 1| cm. remotis, segmentis II. 

 oblique obovatis vel linearibus 7 mm. 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 angulo 45 agressis ; rhachis 



