TAD. CXXXV. 
HYMENOPHYLLUM ELASTICU M. 
FILICES.—G*vmgATz. Br.  PorxvropraACEx. Kaulf. Erriczs vere. Willd. 
GEN. Cuan.. ZYMENOPHYLLUM, Sm.  Sori marginales. Capsule sessiles, receptaculo 
communi cylindraceo inserte, intra Znvolucrum bivalve, textura frondis, valvis planis, exterius 
liberis. £r. 
HyMENoPHYLLUM elasticum ; fronde oblongo-ovata pinnata, pinnis bipinnatifidis, laciniis lineari- 
subattenuatis integerrimis, costa rachi (superne alata) margineque pilosis, involucris parvis 
semiorbicularibus ciliatis. 
Hymenophyllum elasticum. — JZ'ilid. Sp. Pl. v. 5. p. 520. — Spreng. Syst. eset. v. 4. p. 134. 
ISieber, Synopsis Fil. n. 78. 
Haz. In insulis Mauritii et Borboniz. DBory. In sylvis vastis, locis humidis et umbrosis, ad 
arborum truncos insule Mauritii. ID. Prof. Bojer. 
Caudex repens, filiformis, radiculosus, paleaceo-hirsutus. 
SLipes digitalis, teres, ater, glaber, superne subpilosus. 
F'rons, circumscriptione, oblongo-ovata, subacuminata, rigidiuscula, elastica, pinnata; pinnis ovato-lanceolatis, 
acuminatis, alternis, remotiusculis, bipinnatifidis, flavo-viridibus, nitidis, laciniis paululum attenuatis, obtusi- 
usculis, linearibus, subnumerosis, confertis, minute reticulatis, integerrimis, costa nigra margineque pilosis, 
pilis appressis, stellatim ramosis. — Alachis pilosa, superne solummodo marginata. 
Sori numerosi, in laciniis brevibus segmentorum, terminales. 
In'volucrum minutum, semiorbiculare, profunde bivalve, vix semi-immersum, valvis integris ciliatis. 
Receptaculum inclusum. 
Capsule majusculee, numerosse, peltatce. 
Semina minutissima, ovalia, subangulata, pellucida. 
Fig.1. Portio pinnze cum soris. £.2. Involucrum capsulis repletum. £3. Capsule. f.4. Semina :—magn. auct. 
The present is assuredly amongst the most elegant of this beautiful family, and remarkable, as its 
name implies, for its elastic property. "The whole frond is of a glossy yellow-green colour, with the 
midrib black, and clothed, as is the margin, with appressed branching hairs. "We have received 
numerous specimens from our friends C. Telfair, Esq. and Professor Bojer, from the Mauritius. 
