307 



obtusissimia basi obliquis laterc superiore auriculatis laterc inferiore cuncatis 

 subsessilibus margine creniilatis ad sinus crenarum setula singula iustructis 

 (setulis 1-2 ram. longis recurvis ascendeutibus) supra glabris subtus ad costulas 

 sparse squamatis ; pinnis infiinis brevioribus plus minus deorsuin reflexis superi- 

 uribus gradatim brevioribus versus apicem abrupte reductis ad dentern acmniuis 

 abeuntibus; rhachis semper alata cum alis l^rnm. lata; costis rhachis vel pinna) 

 supra plus subtus minus elevatis gracilibus. Fr. fertilis: stipes quam is sterilis 

 cluplo longior ; frons linearis 8-12 cm. longa 1-2 cm. lata pinnata apice obtusa 

 basi truncata, pinnis oblongis vel ellipticis vel plus minus elongato-oblougis 3- 

 10 mm. longis 2-5 mm. latis apice obtusissirnis basi rotundatis vel levitcr 

 cordatis membranaccis suboppositis vel alteruis iuferioribus a se 1cm. remotis 

 superioribus plus approximatis subtus dense soriferis, venis soriferis hand vel 

 vix incrassatis ; textura rigide mernbranacea, rhachis hand alata, pinnis brevis- 

 sinie petiolulatis. 



Pohjbotrya appendiculata HAYATA, in HAYATA et MATSUM. Enum. PI. 

 Formos. p. 585 (non J. SM.). 



HAD. Inter Urai ct Rahao, leg. K. MIYAKE, Oct. 1899; Kotosho, Loo-choo: 

 Okinawa. 



The present fern accords exceedingly well with the figures given in BLUME'S 

 Floras Java3. This and the preceding species were previously confused and 

 altogether regarded to be identical with P. appendiculata. After studying a 

 number of the ferns, I have found that there are clearly two forms which are 

 very constant and do not seem to be variable from one to the other. One 

 form represented by P. duplicato-serrata HAYATA has the much longer fronds, 

 wingless rhachis and incrassate soriferous veins, while the other, the present 

 species, has always much smaller sterile fronds with winged rhachis and very 

 slightly incrassate soriferous veins. The former differs from P. appendiculata in 

 the pinnas, which are always acuminate at the apex, while the latter accords 

 pretty well with the description of the same species given in HOOKER'S Sp. Fil. 

 V. p. 251. According to HooKER, a) CHPJST 2) and DiELS, 3) P. appendiculata is 

 in the highest degree variable. The description of HOOKER includes many 



1) HOOKER, \V. J. Species Filicura V. p. 251. 



2J CHRIST, H. Farnkriiuter der Erde p. 43. 



3) DIELS, L. ENGL. u. PRAXTL Nat. PfL fam. I.-4, p. 196. 



