TAD OLEXVI. 
TRICHOMANES ANGUSTATUM. 
FILICES.—GvnarTz. Br.  PorvropnracExm. Kaulf. — Firrcrs vere. Willd. 
Gr. CHag. TRICHOMANES, Sm. Sori marginales. Capsule sessiles, receptaculo com- 
muni cylindraceo insertz, intra involucrum monophyllum, suburceolatum, ore hiante, textura 
frondis. Br. 
TnicHoMANES angustatum frondibus lanceolatis flaccidis pinnatis, pinnis bipinnatifidis, laciniis 
anguste linearibus glabris integerrimis apice emarginatis, rachi terete nudo, involucris cylin- 
draceo-turbinatis alatis, ore dilatato compresso bilabiato. 
Trichomanes angustatum. — Carm. im Linn. Trans. v. 12. p. 513. — Spreng. Syst. F'eget. v. 4 
p. 130. 
Has. In rupibus Insul Tristan da Cunha. — Carmichael. í 
Caudez, ut in plerisque congeneribus, gracilis, filiformis, repens. 
Stipes subbiuncialis, teres, nudus, viridi-fuscus. : 
Frons subspithamea, circumscriptione lanceolata, flaccida, pallide virens, pinnata; pinnis alternis, lanceolatis, 
profunde bipinnatifidis, laciniis lineari-angustatis, costatis, costa concolore, laxe reticulatis, glaberrimis, 
integerrimis, nonnunquam furcatis, apicibus emarginatis. Züachis omnino nuda, teres, viridis. 
Sor in laciniis brevibus pinnarum, terminales. 
Jnvolucrum subturbinatum, vel turbinato-cylindraceum, inferne attenuatum, marginibus utrinque lato-alatis, ore 
dilatato, compresso, bilabiato, labiis subundulatis, integerrimis. 
Fieceptaculum filiforme, involucro duplo longius, basi capsuliferum. 
Capsule peltatee, annulo completo cinctze. 
Semina spheerica, fusca. 
Fig.1. Portio pinnze cum soro. f.2. Involucrum. 1.3. Capsule. £f.4. Semina:—magn- auct. 
This species is remarkable for its very flaccid nature, its pale green colour, and the distinctly 
winged involucre: or, in other words, the involucre is immersed in the substance of the fronds 
for its whole length. 
