Hymenophyllum. | FILICES. 637 
few dark striae in the intervals between them. Invol. tubular, slender, 
about 1“ long, with an expanded bilabiate mouth, curved, truly axillary, 
terminating the first superior veinlet of a lobe, rarely 2 or 3 to a lobe, 
quite free, stipitate, the thickened tube brown, the lips green. Columella 
about the length of the tube. 
Oahu! in the woods of Kahuku _ Kahana. Quite peculiar in the curvature of 
Uw e 
tatum, Van d . Bosch, from New Ca ledonia, coming nearest to it; but it is less rigid, and 
th iati tha at spec ecies. It has 
the climbing habit of T. davallioides ‘and when growing is apt to mis for it. 
It is the 7. radicans, var 8, of Mr. Baldwin's sale -collections. The involucre is distinctly 
bilabiate and the tubular portion has two layers of cells, while in red lips there is only 
a single one, as in the frond itself. In 7. davallioides the thickening of the rege 
portion is hi to the development of ducts of prosenchymatic ilecsealnine: which i: 
not present h 
S, 7. ee Bory in Willd. Sp. Pl. (not Kaulf.). — Caudex suberect, 
2—3‘ long, stout. Stip. fibrillose with patent rufous hair, 4—8' long. 
Frond dark-green, rigid, lanceolate, attenuate below, rarely the lowest 
Oe nearly as long as the next upper ones, 6—12' * 8—5‘, polysti- 
, tri-, quadripinnatifid, with the primary and secondary rhachides 
Pinnae 20—26 on a side, ascending, shortly stipitate, linear - lanceolate, 
the longest 2—4‘ long. Ultimate segments linear, holding a single ve 
with more or less of cellular tissue. Sori 2—8 to a pinnule, in the tee 
of the tertiary segments. Invol. small, !/:—*/s‘’, green,  Getekss or cup- 
shaped, entire, free or partly immersed, according to the division of the 
ro Columella in generally not protruding. — Hook. p. Fil. I, 137. 
— Ie. Pl. tab. 703. — Synops. Fil. p. 86. — T. apiifolium, pak — T. Bauer- 
— T. exaltatum, Saisie — In one of my specimens the 
ianum, Endl. : 
se allie consist of the vein only, with a border of tissue in the axils. 
trestrial; in s woods of all islands, oa a common. Occurs also in the Samoa 
ady 
si ‘Viti Islands, on Norfolk Isld., Java and Luz 
24. HYMENOPHYLLUM, J. Sm. 
Involucre bilabiate. Columella short, enclosed, bearing the sporangia 
at its apex. Otherwise as in Trichomanes and with the same geographical 
range. 
Pinnae comiacieed co beonirte mf Sores eae rhizome long-creeping: 
rond lanceolate, acu 
Frond | saacenan ¢ throu sont a 1. H. recurvum. 
‘ond ciliate on the margins and nerves ‘of the segments and 
at the apices of the involucres 3 : : fe = & srernsategsae 
rond ovate or obovate or deltoid, obtuse, hispid throughout ; H. obtu 
Pine aie oe divided; fronds tufted on a short rhizome, the a 
hispid : : : ‘ 4, H. Baldwint. 
