Filices. | FLORA OF TASMANIA. 135 
rachi superne alata inferne nuda, stipite glaberrimo ima basi parce lanato.—Hook. Sp. Fil. i. p. 111. H. 
nitens, Br. Prodr. 159; Fl. N. Zeal. ii. 151; Hook. et Grev. Ic. Fil. t. 197. (Gunn, 19, 1514.) 
Has. Damp forests, abundant, especially on Tree-Ferns.—(v. v.) 
Disrris. Victoria, New Zealand. 
A very beautiful small species, often clothing the trunks of Tree-Ferns with its pale-green, glistening fronds. 
—Rhizome rigid, wiry. Stipes 2-4 inches long, wiry, glabrous, except at the very base, where there is a tuft of 
soft, pale-brown, woolly hairs. Fronds broadly ovate when erect, linear or oblong when pendulous, 2-6 inches 
long, pinnate below, pinnatifid above, perfectly smooth, transparent. Pinne twice pinnatifid; segments linear, 
quite entire and smooth, generally broadly cuneate at the base. Involueres small, terminal on lateral segments, 
orbicular or oblong, the valves entire or toothed. 
Oss. I know nothing of H. australe, Willd. Sp. Pl. v. 527 (said to be found in Tasmania by Labillardiêre), 
except it be the H. rarum, as conjectured in the ‘Species Filicum,’ p. 108. 
Gen. V. TRICHOMANES, Sm. 
Sori marginales. Involuerum tubulosum, textura frondis, basi attenuatum, apice dilatatum v. bivalve. 
Capsule receptaculo filiformi seepius exserto sessiles, depressee, annulo completo transversali cinctee, longi- 
tudinaliter ruptee.—Frondes plerumque membranacee, pellucida, cellulis magnis reticulata. 
A more tropical genus than Hymenophyllum, to which alone it is very closely allied, and from which it differs 
in the tubular or trumpet-shaped involucre, which is less obviously two-lipped, often quite circular at the mouth, 
and having a generally exserted, filiform receptacle. (Name, an ancient one of uncertain application.) 
l. Trichomanes venosum (Br. Prodr. 159); rhizomate repente filiformi, fronde parvula pendula 
nitida membranacea pinnata, pinnis remotis late lineari-oblongis ligulatisve simplicibus v. basi furcatis obtusis 
v. emarginatis margine non incrassato repandis, costa flexuosa, venis furcatis, involucris ad basin pinnarum 
fronde immersis liberisve tubuloso-urceolatis, ore dilatato breviter bilabiato, receptaculo plerumque capillari, 
rachi apice alata inferne stipiteque capillari.— Hook. et Grev. Ic. Fil. £. 18; Hook. Sp. Fil. i.p. 132; Fl. 
N. Zeal. à. 17. (Gunn, 1515.) 
Has. Abundant, clothing the trunks of Tree-Ferns.—(v. v.) 
DisrRis. New South Wales, Victoria, New Zealand. 
An extremely delicate and beautiful Fern, often clothing Tree-Ferns, as Hymenophyllum flabellatum and H. 
rarum do.—Rhizome creeping, and stipes capillary. Fronds 2-5 inches long, linear, pinnate, membranous. Pinne 
distant, linear-oblong or strap-shaped, cuneate at the base, not margined, blunt or emarginate, waved along the 
edge, simple or divided at the base, 3-14 inch long, + inch broad; costa flexuose, giving off branching veins. 
Involucres on the upper edge of the pinna at its base, sunk in the frond or ina lateral segment. Receptacle included, 
or capillary and exserted. The upper pinne are often of irregular length, sometimes very long and caudate. 
Tribe IV. PoLYPODIEE.— Sorus near the margin of the frond or dorsal, rounded or linear. Capsules not 
placed on an elevated receptacle, stalked, partly girt with a vertical ring, bursting transversely on the 
side where the ring is wanting. 
Sub-tribe A.—Sorus covered with an involucre (indusium), or with the more or less altered margin of the 
rond. 
Gen. VI. CYSTOPTERIS, Bernh. 
Sori globosi, dorsales. Involuerum superficiale, membranaceum, cucullatum, basi inflata infra sorum 
