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T R I C H O M A N E S A N G U S T A T UM.
I'TLICES.— G y r a tæ , . B r . P o l y p o d i a c e æ . K a u lf. F i l i c e s v e ræ . Willd.
Gen; Char. T R I C H O M A N E S , Sm. S o r i marginales. Capsula sessiles, receptáculo communi
cylindraceo insertæ, intra involucrum monophyllum, suburceolatum, ore hiante, textura
frondis. Rr .
T r i c h o m a n e s 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.
Tricbomanes angustatum. Carm. in L in n . T ra n s, v . 12. p . 5 1 3 . S p -en g . S y s t. V eg e t. v . 4.
p . 130.
Hab. In rupibus Insulæ Tristan da Cunha. Carmichael.
Caudex, ut in plerisque congeneribus, gracilis, filiformis, repens.
Stip e s subbiuncialis, teres, nudus, viridi-fuscus.
Frotis subspithamoea, circumscriptione lanceolata, flaccida, pallide virens, pinnata; pinnis alternis, lanceolatis,
profunde bipinnatifidis, laciniis lineari-angustatis, costatis, costa concolore, la x e reticulatis, glaberrimis,
integerrimis, nonnunquam furcatis, apicibus emarginatis. R a c h is omnino nuda, teres, viridis.
S o r i in laciniis brevibus pinnarum, terminales.
Involucrum subturbinatum, v e l turbinato-cylindraceura, inferne attenuatum, marginibus utrinque lato-alatis, ore
dilatato, compresso, bilabiato, labiis subundulatis, integerrimis.
Receptacìdum filiforme, involucro duplo longius, basi capsuliferum.
Capsidæ peltatæ, annulo completo cinctæ.
Semina sphærica, fusca.
F ig . 1. Portio pinnæ cum sovo. f. 2 . Involucrum. f. 3. Capsulæ. f. 4. Semina:— ma gn-auct.
T his 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 o f the fronds
for its whole length.