TAB. LXXXIII. 



HYMENOPHYLLUM 



SEMIBIVALVE 



FILICES. 



Gy 



EAT«. 



r. 



OLYPODiACEiE. Kaulf. Filices verae. Willd. 



Gen. Chae. HYMENOPHYLL UM, Smith. 



Sori marginales. Capsulce, sessiles, receptaculo 



communi cylindraceo inserte, intra Involucrum bivalve, textura frondis, valvis planis, 



liberis. Br. 



exterius 



s 





Hymenophyllum semibivalve ; frondibus bipinnatifidis lanceolatis glabris, laciniis linearibus obtusis 



glabns immargmatis, involucris rotundato-urceolatis semi-immersis, parte superiore solummodo 



bivalvi. 



■ 



4 



Hab. In Insula Novae Zeelandiae. D. Menzies. 



Planta omnino glabra. 



Cau&ex gracillimus, repens, filiformis, hic iilic fibris minutis fuscis radicans. 



Stipes longitudine variat, duas vel tres lineas longus ad bipollicarem, filiformis, fuscus. 



Frons, circumscriptione 



duas ad tres uncias lon 



5 



unciam 



adulta bipinnatifida, laciniis paucis subunilateralibus, linearibus, obtusis, omnino 

 Reticulationis areoltz parvae, rotundatae. Color, siccitate, olivaceo-fuscus 



juniore simpliciter pinnatifida 



& 



Costa distincta 



Sori in laciniis praecipue versus apicem, vix infra medium, frondis, terminales, suburceolati, parte inferiore immersi 



superiore solummodo bivalvi, valvis semiorbicularibus. 

 Capsulce paucae, fuscae, peltatae, rotundatae, compressae, annulo integro cinctae. 

 Receptaculum breve, inclusum. 



* 



Semina oblonga, subangulata, obscure reticulata, flavescentia, semipellucida. 





Fig. 1 . Portio frondis cum soris. f. 2. Involucrum. 



magn. auct. 



f. 3. Portio receptaculi, cum capsulis duabus. f. 4. Semina : 



We are indebted to Mr. Menzies for specimens of this New Zealand Hymenophyllum. The name 

 of " Hym. asplenioides" was upon the label which accompanied them, written probably by mistake, 

 since that is a West Indian species, and described amongst those which have simple fronds. 



The present individual is remarkable for the structure of its involucre, which may be reckoned 

 almost intermediate between that of Trichomanes and Hymenophyllum ; the lower half or even more 



being sunk 



the extremity of the frond, and the upper portion forrning two short almost 



semi 



ircular lips or valves 





■ 



