TAB. CXCVIII. 
HYMENOPHYLLUM GRACILE. 
FILICES.—GrvnATxz. Br. Porvropnraczx. Kaulf.  FriLiczs verw. Willd. 
Gzw. CHag. HYMENOPHYLLUM, Sm. Sor marginales. Capsule sessiles, receptaculo 
communi cylindraceo insertz, intra Znvolucrum bivalve, textura frondis, valvis planis, exterius 
liberis. Br. 
HyMENOPHYLLUM g7acile; fronde pinnata, pinnis remotis bipinnatifidis laciniis linearibus obtusis 
integris bifidisve, rachi marginata, involucra late subrotunda, basi cuneata immersa. 
Hymenophyllum gracile. Bory. JZld. Sp. PI. v. 5. p. 527. Spreng. Syst. Veget. v. A. p. 131. 
Has. In sylvis insule Mauritii... Dor? Bory, Bojer, Carmichael. 
| Caudex, ut in plurimis hujusce generis, gracilis, flexuosus, ramosus, hic illic radiculoso-fibrosus. 
Stipes erectus, atro-fuscus, nudus, 2—9 uncias longus. 
Frons digitalis et ultra, circumscriptione ovata, pinnata; pinnis alternis remotis, bipinnatifidis, glabris, siccitate 
fusco-badiis, laciniis linearibus, integerrimis, obtusis, simplicibus vel bifidis, minute reticulatis. 
Involucra ad apices laciniarum, solitaria, semi-immersa, fere orbicularia, magis lata quam longa, inferne cuneata, 
superne bilabiata, labiis semiorbicularibus. 
Receptaculum inclusum, breve stipitatum, apice capsuliferum. 
Capsule orbiculares, compressze, annulo completo cinctae. 
Semina subangulata, pellucida, obscure reticulata. 
Fig.1. Pinna fructifera. £2. Lacinise pars, cum involucro. f.3. Receptaculum capsuliferum. f.4. Semina:— 
magn. auct. 
Like some others of the genus, the present species, in a dry state at least, is of an almost chestnut- 
brown colour: it has a peculiar aspect, in consequence of its remote pinna and not very numerous 
lacinia. 
