AHymenophyllum. | FILICES. 9 
NortH AND SoutTH IsLanps, Stewart Is~tanp, CHATHAM ISLANDS: Abundant 
in damp woods throughout. AuckLAND IsLanps: Sir J. D. Hooker (Handbook). Sea- 
level to 3000 ft. 
Also in several of the Polynesian islands and in Java. One of the most handsome 
species of the genus. 3 
-~ 
Vt ' Brut ; 
8. H. demissum Swartz Syn. Fil. (1806) 147.—Terrestrial or epiphytic, 
forming large patches. Rhizome long, wiry, creeping. Fronds erect or 
decurved, membranous, bright pale-green, 4-16in. long including the 
stipes, 2-5in. broad, ovate-deltoid or ovate-lanceolate, acuminate, 3—4- 
pinnatifid. Stipes 2-6in. long, terete, smooth and glabrous, wiry, not 
winged above or very obscurely so; rhachis obviously winged in the upper 
part, but the wing much narrowed and sometimes obsolete below. Primary 
pinnae spreading or ascending, rhombic-lanceolate or rhombic-triangular ; 
secondary short, broad, again 1—2-pinnatifid. Ultimate segments #,—} in. 
long, 31m. broad, linear, obtuse, flat, quite entire. Sori small, very 
numerous at the tips of the segments, not confined to the lateral ones, not 
sunk in the frond. Indusium ovate, obtuse or subacute, 2-valved to the 
base ; valves entire or lobed.—A. Rich. Fl. Nouv. Zel. (1832) 92; A. Cunn. 
Precur. (1836) n. 245 ; Raoul Choixz (1846) 39; Hook. Sp. Fal. i (1846) 109 ; 
Hook. f. Fl. Now. Zel. 11 (1855) 14; Handb. N.Z. £1. (1864) 354; Hook. and 
Bak. Syn. Fal. (1873) 61; Thoms. N.Z. Ferns (1882) 41; Field N.Z. Ferns 
(1890) 58, t. 18, f. 1; Cheesem. Man. N.Z. Fl. (1906) 934. H. erecto-alatum 
Col. on Trans. N.Z. Inst. xi (1879) 431. H. megalocarpum Col. in Trans. 
N.Z. Inst. xv (1883) 318. H. polychilum Col. in Trans. N.Z. Inst. xxiv 
(1892) 395. Trichomanes demissum Forst. f. Prodr. (1786) n. 468. 
KerMADEC JIstanps, NortH AND SoutH ISLANDS, CHATHAM ISLANDS, STEWART 
Tstanp, AUCKLAND IsLANDS: Abundant in woods throughout. Sea-level to 3000 ft. 
Also found in Polynesia, Java, and the Philippine Islands. The veinlets often 
fork towards the tips of the segments, and in profusely fruited specimens there is usually 
a sorus at the tip of each veinlet. When the fork of the veinlet is very close to the tip 
of the segment the two sori are often included in a single indusium, the valves of which, 
however, are more or less cleft at the apex. All gradations can be traced between two 
indusia placed side by side, and a single indusium containing 2 receptacles. Mr. Colenso’s 
H. megalocarpum and H. polychilum, named specimens of which appear to me to be 
identical, are founded mainly on this peculiarity, and show no other differences. His 
Hi. erecto-alatum was separated on account of the broader crisped wing of the rhachis, 
but the type specimens prove this character to be a very obscure and uncertain one. 
/e c-, 2 Oe 
9. H. seabrum 4. Rich. Fl. Nouv. Zel. (1832) 90, t. 14, f. 1—Usually 
clothing the trunks of trees, rarely terrestrial. Rhizome long, creeping, 
wiry, more or less bristly with reddish-brown scales. Fronds very variable 
in size, usually from 6in. to 20in. long, but luxuriant specimens some- 
times attain 30in., 2-5in. broad, ovate-deltoid or ovate-lanceolate or 
linear-oblong, acuminate, membranous, dark olive-green or olive-brown, 
erect or pendulous, 3-4-pinnatifid. Stipes 2-6in. long, not winged, more 
or less densely clothed (as are the primary and secondary rhachides and 
costae) with reddish-brown jointed hairs; rhachis winged above, wingless 
below. Primary pinnae 1-3 in. long, close or rather distant, spreading or 
erecto-patent, rhomboidal-lanceolate or -oblong, acuminate; secondary 
deeply pinnatifid or 2-pinnatifid. Ultimate segments linear, obtuse, flat, 
quite entire. Sori numerous, terminal on the lateral segments on both 
sides of the pinna. Indusium rather small, orbicular or ovate-orbicular, 
2-valved to the base; valves usually toothed—A. Cunn. Precur. (1836) 
n, 235; Raoul Choiz (1846) 39; Hook. Sp. Fil. 1 (1846) 110; Hook. f. F!. 
