258 HYMENOPHYLLACE^E. 



frondis et segmentorum alata cum alls 2 mm. lata, alis undulato-crispatis. 

 Sori ad apicein loborum juxta rhachin sitorum solitariter vel geminatim dis- 

 positi. Involucrum ovatum dorso complanatum circ. 2 mm. longiim 1| mm. 

 latum apice truncatum margine subintegrum sed apice crenulato-denticulatum 

 ad basin 2-valvatum. Pagina frondis secus rhachin minute squamulata vel 

 squamis obsoletis. 



HAB. Mt. Arisan, inter Heishana et Nimandaira. 



Hymenophyllum Simonsianum HOOKER (Fig. 92); BAKER Syn. Fil. 

 p. 68. "Stipes slender, wiry, naked, 1-2 in. long ; fronds linear-oblong, 2-3 in. 

 long, fin. broad, once pinnatifid down to a broadly-winged rachis ; segments 

 fan-shaped, with only shallow divisions directed from the apex towards the base; 

 veins dichotomous, the margins spinuloso-dentate ; sori 1 to 4, terminal on the 

 divisions of the upper pinnae ; involucrum broadly oblong, divided nearly to the 

 base ; valves spinuloso-dentate " the description here quoted agrees exactly with 

 our plant. The figures of the same species given in HOOK. 2nd. Cent. Fern. t. 

 13 an$ BEDDOME Fern. Brit. Ind. t. 281 accord pretty well with our fern. 

 The following description is drawn from a specimen of my collections : Rhi- 

 zoma repens filiforme fusco-rubescens teres ^ mm. in diametro remote paucissime 

 squamatum nitidum ; squamaa ad basin stipitum setuliformes fusco-rubescentes, 

 minus quarn 1mm. longae nitidas. Stipes 1-1^ cm. longus glaber vel pilis setuli- 

 formibus sparse conspersus castaneo-rubescens teres. Frons in ambitu elongato- 

 oblonga vel oblonga 3| cm.-7^ cm. longa 18-23 mm. lata apice rotundata vel 

 obtusissima basi late cuneata vel truncato-cuneata ad basin breviter ad stipitem 

 deccurrens pinnatifida inferiore circ. ad costam fissa inedio circ. ad locum costa 

 ^ mm. distantem fissa superiore pinnatilobata, segmentis generaliter cuneatis 

 subunilateralibus mediis 13 mm. longis 11 mm. latis obovato-cuneatis apice 

 obtusissimis basi cuneatis 4 mm. latis latere superiore 2-3-lobatis, lobis oblongis 

 obtusissimis basi haud constrictis, margine toto cum rhachibus argute aristato- 

 serrulatis, serrulis patentibus vel leviter ascendentibus leviter recurvis vel rectis, 

 textura hyalina membranacea in exsiccato fulvo-viridi utraque pagine glabra 

 sed ad costas venas venulas pilis brevissimis clavatis rubescentibus conspersa, 

 costis venis venulisque utraque pagine convexo-elevatis, venis lateralibus (i.e. 

 costis pinnarum vel loborum) a costa rhachis angulo 40" egressis deorsum angu- 



