POLYPODIACE^E. 



297 



subrectis superioribus plus minus sursum recurvis, pinnulis inferioribus a 

 rhachibus pinnarum angulo SO^DO" egressis rectis superioribus angulo 50'-60 

 egressis subrectis ; segmentis pinnularum a rhachide pinnularum inferioribus 

 angulo recto egressis superioribus plus minus ascendentibus. Sori ad marginem 

 basis lateris superioris lobulorum pinnularum ordinis secundarii singulariter 

 clispositi partibus recurvis marginis lobulorum frondis subobtecti. 



HAB. Nimandaira, leg. TAKEO ITO et B. HAYATA, Aprili. 1914. 



Near Hypolepis tenuifolia BERNH.; but differs from it by the much thinner 

 fronds with quite obtusely lobed terminal segments. Also near Hypolepis 

 punctata METT. (=Dryopterls punctata C. CH.) ; but easily distinguishable from 

 it by the chestnut coloured stipes and rhachis, and by the dark coloured fronds 

 in dried specimens. 



Leptochilus KAUL. 



Leptochilus angustipinnus HAYATA sp. nov. (Fig. 119). Rhizoma ? Frons 

 sterilis : Stipes 30 cm. longus medio 2^-3 mm. latus 

 basi minute densiuscule squamatus, squamis polygo- 

 no-oblongis subamoeboideis 1 mm. longis \ mm. latis, 

 stramineiLS plano-convexus in sectione supra planus 

 subtus convexus supra 4-5 sulcatus ; frons ovato- 

 triangularis 45cm. longa 30cm. lata medio latissima 

 basi minus lata vel aequilata vel latior apice caudato- 

 acuminata basi in ambitu truncata pinnata, pinnis 

 linearibus infimis 16 cm. longis, pinnis mediis sub- 

 eequilongis superioribus gradatim brevioribus minori- 

 bus, versus apicem frondis ad pinnas laterales super- 

 rimas minimas 4-5 cm. longas abeuntibus ; pinna 

 termiiiali subito longior pinnas superrimas laterales 

 in longitudine 3-4-plo supcranti vel interdum per- 

 fecte obsoleta et ad prolern reducta; pinna infima line- 

 ari 15-1 6 cm. longa 2 cm. lata apice gradatim acumi- 

 natissima, acuminibus minus quam 3 mm. latis 2 cm. 

 longis, medio deorsum asquilata basi late triangulari- 

 acuta margine repandula, repandulis mediis 4mm. 



Fig. 119, Leptochilus 

 angustipinnus HAYATA ; a, 

 a portion of a pinna of a 

 sterile frond ; b, a portion 

 of a pinna of the fertile 

 frond; c, cross section of 

 the same; d, a scale on 

 the stipe. 



