Hymenophylium. | FILICES. 15 
Nortu AND SoutH IsLanps, Stewart Isnanp, CHATHAM ISLANDS, AUCKLAND AND 
CAMPBELL IsLaANDs, AnTipoDES IsLAND: Abundant throughout. Sea-level to 4000 ft. 
Varying greatly in size and habit, but always easily recognized by the very 
gates indusium. It is also found in Fiji and others of the Pacific islands. 
| ©: Lad f ) « Schiad . 
20. A, iaice, Swartz Syn, Fil. (1806) 146.—Forming large matted 
patches on the eround among moss, more rarely epiphytical. Rhizome 
stout, wiry, creeping; rootlets densely villous. Fronds (including the 
stipes) usually from 6-9in. high, 2-4in. broad, but luxuriant specimens 
reach 12-14 in., with a breadth of 6in., broadly ovate or deltoid, acumi- 
nate, rather rigid, often decurved, 3—4-pinnatifid. Stipes 2-5 in. long, terete, 
wiry, glabrous, not winged; rhachis narrowly winged above. Primary 
pinnae triangular or ovate-lanceolate, acuminate, cut down almost to the 
rhachis into rhomboidal-lanceolate secondary divisions, which are again 
pinnatifid or 2-pinnatifid. Ultimate segments narrow-linear, obtuse, deeply 
spinulose-dentate. Sori usually numerous, terminal on the segments, im- 
mersed at the base. Indusium ovate or ovate-orbicular, cuneate below, 
2-valved nearly to the base; valves quite entire—A. Rich. Fl. Nouv. Zel. 
(1832) 93; A. Cunn. Precur. (1836) n. 244; Raoul Choix (1846) 39; Hook. 
Sp. Fil. 1 (1846) 98, t. 3835p; Hook. f. Fi. Nov. Zel. ii (1855) 12; Handb. 
N.Z. Fl. (1864) 353; Hook. and Bak. Syn. Fil. (1873) 69; Thoms. N.Z. 
Ferns (1882) 37; Field N.Z. Ferns (1890) 67, t. 17, f. 3; Cheesem. Man. 
N.Z. Fl. (1906) 941. H. spathulatum Col. in Tasm. Journ. Nat. Sci. ti 
(1846) 184. Trichomanes bivalve Forst. f. Prody. (1786) n. 466. 
NortH Istanp: Hilly forests from the Great Barrier Island (C. P. Winkelmann. !) 
and Cape Colville southwards, not common to the north of the East Cape. SoutH 
IsLAND, STEWART IsLAND, CHarHamM IsLANDS: Not uncommon throughout. Sea- 
level to 3000 ft. 
Allied to H. multifidum, but a larger and less rigid plant, of a paler-green colour, 
and with smaller indusia immersed in the tips of the segments, not axillary. It is said 
to be found in New South Wales. 
2. TRICHOMANES Smith. 
Ferns, usually of small size. Rhizome slender or rather stout, often 
much branched, olabrous or tomentose. Fronds compound or rarely simple 
and entire, of the same delicately membranous texture as Hymenophyllum, 
often pellucid, usually of a single layer of cells, rarely of 3-6 layers. 
Ultimate segments linear or narrow-oblong, entire or rarely toothed at 
the margin, with a stout central costa. Sori marginal, terminal or lateral, 
more or less immersed in the frond or quite free, always terminating a vein. 
Indusium tubular or trumpet-shaped, truncate at the mouth or with a 
narrow spreading lip or border, usually of the same texture as the frond. 
Receptacle elongated, filiform or columnar, usually exserted beyond the 
indusium. Sporangia sessile, depressed, surrounded by a bread complete 
horizontal ring, bursting transversely. 
A genus of nearly 200 species, of almost precisel y the same geographical range as 
Hymenophyllum, and agreeing with it in habit and in the delicate texture of the frond, 
but differing in the shape of the indusium, which is cylindrical or urceolate, and either 
truncate at the mouth or very shallowly 2-lipped. Of the 7 species found in New 
Zealand, 3 appear to be endemic, 3 occur in the Polynesian islands, one of them 
extending as far north as Java and Formosa, the remaining one is found in Australia 
and ‘Tasmania. 
