136 OOPELANl). 
ACROSORUS Copel. 
Acrosorus Merrilli Copel. n. sp. 
Eliizoniata ut in A, exaltato; frondibus 20-30 cm. longis, ca. G mm, 
latis vix ad costam glabram pinnatis, deorsum ad alain undulatam re- » 
ductis, sessilibus, confertissiniis, coriaceis, iufra miuute nigro-punctulatis ; 
segmentis sterilibus obtuse inaeqni lateral iter triangiilarihus; fertilibus 
tortis, lamina redncta. 
Miudoro, iul iiiontetii Ualoon, ab aiTK)ribus permuscosis pendens, 1,300 m. s. 
m. (No. G002). . 
This species lias its nearest afTuiity in its geograpliically nearest relative, 
A. exaltaius of Mount Apo, from wliicli it differs in being distinctly smaller 
and more slender, witli narrower sterile segments and more reduced and twisted 
fertile segments, giving the fertile apical part of the frond an appearance of 
distinctness wanting iu it. exaltatus. In this respect it approaches A. Rclncclei 
(Christ), of Samoa. 
PROSAPTIA Presl. 
Prosaptia contigua (Forst.) Presl. 
Epiphytic on mossy trees at 1,800 ni. alt. (Xo. 5998). The typical form 
and tlie variety monosora are about equally abundant, 
Malaya to Polynesia. 
Prosaptia polymorpha Copel. n. sp. 
Species P. alatae afifinis, nee non ilia segmentis latioribus minus trun- 
catis, soribusque in dentes obtnsis immersis nee ad apices segmcntormii 
restrictis^ diversa; frondibus usque ad 40 em. longis, 3 cm. latis, acumi- 
natis, subcoriaceis ; segmentis oblongis, obtusis vel subacutis, deorsum 
sensim in undulas alae 5-S cm. longae, demum integrae, in stipitem i, 
brevem attenuatac elatis; soris in r^eguiento quoque ca. 5. 
Apud fluniinem Alag ad arbores saxaque epiphytiea, 150 m. s. m. (No. 5997). 
Tliis material, although for the most part uniform in essentials, shows a 
few wide variations, one frond being in its upper linlf like P. contigua monosora, 
and a few so like P. ahila that if they had been alone, they could have been ~ 
referred to that species. P. polymorphs impresses me as being between P. alata 
and P. Toppingi, differing from the latter in the narrower, sharper sinuses, more 
w 
rounded segments and loss coriaceous texture. 
POLYPODIUM Linn. 
Polypodlum jagorianum Mett. 
Epiphytic on exposed ridges at 1,400 m. alt. (Xo. 5900). 
The known range of this species is from Mount Mariveles, Luzon, to Mount 
Silay, Negros, always in the same habitat. 
Polypodlum setosum BI., var. caivum Copel. n. var. 
Costa margineque superlicieque pilis sparsissimis vestitis; aliter typi- 
eale. 
Ad arbores moscosos, 2,400 m. s. m. {Xo. 5905). 
Tliis feru agrees with Blume*s description and with specimens that I believe 
to be correctly determined, in texture, form, sori and pubescence of the stipe. 
