Hymenophyllum. | FILICES. 939 
Nort Isnranp: Auckland—Whangaroa, R. W. Rowson! Great Barrier 
Island, Kirk ! Whangarei, Coromandel, Thames, Titirangi, Hunua, 7’. #’. C.; 
Te Aroha Mountain, Adams! SoutH Istanp: Nelson—Mokihinui, Kirk! Can- 
terbury — Upper Waimakariri, Arthur’s Pass, Armstrong! Hnys! Kirk! 
T. F. C. Westland—Hokitika, Kirk ; Kumara, J. M. Brame; Okarito, A. 
Hamilton! Srmewart Isuanp: Ruggedy Mountains, Kirk. Sea-level to 
3500 ft. 
A peculiar little species, usually found among moss on the upper branches 
of forest-trees, or on the perpendicular faces of rocks. I am unable to maintain 
H, Armstrongii as a separate species, for the stout marginal nerve, which is 
supposed to separate it from H. Cheesemanii, is an inconstant character, and 
fronds may be picked from the same rhizome with or without it. Usually, 
however, epiphytic specimens want the nerve, and rupestral ones possess it. 
16. H. minimum, A. Rich. Fl. Nowv. Zel. 91, t. 14, f. 2.—Minute, 
forming matted patches on rocks or on the trunks of trees. 
Rhizome much branched, filiform, wide-creeping, glabrous or spar- 
ingly bristly. Stipes wiry, filiform, naked, 4-$in. long. Fronds 
very small, +-2in. long, broadly oblong-deltoid or ovate, erect or 
recurved, firm, pale-green when fresh, often reddish-brown when 
dry, pinnatifid or pinnate at the base. Segments 2-6 pairs, close, 
spreading, simple or the lower ones forked, linear, obtuse, more or 
less coneave, rigid, quite glabrous; margins spinulose-dentate. Sori 
never more than one to a frond, terminating the main rhachis, 
stipitate, quite free. Indusium rather large, obovate-cuneate, nar- 
rowed at the base, 2-valved to the middle; valves spinulose on the 
back; margins rounded, sharply spinulose-dentate. Receptacle 
stout, often exserted in age.—A. Cunn. Precur. n. 242; Raoul, 
Glow, 39; Hook. f. Fl. Antarct. 1. 103; Fl. Nov. Zel. u. 12; 
Handb. N.Z. Fl. 353; Hook. and Bak. Syn. Fil. (edit. 2) 464; 
Thoms. N.Z. Ferns, 36. 
SoutH Isnranp: Nelson—Tasman Bay, D’Urville. Westland—Coast near 
Okarito, A. Hamilton! Otago — Resolution Island, Hnys! Hast Coast, 
Buchanan! A. Hanvilton! Stewart Istanp: Not uncommon, Kirk! Auvck- 
LAND ISLANDS: Scarce, Sir J. D. Hooker. 
A much misunderstood species; most collectors confusing it with small 
forms of H. Tunbridgense, from which, however, it is readily distinguished by 
the uniformly solitary and terminal sori, the indusium of which is spinulose on 
the back as well as on the margins. It appears to bea littoral plant, never 
found far from the sea. 
17. H. Tunbridgense, Smith, Fl. Brit. 1141.— Forming broad 
densely inatted moss-like patches on rocks or on the trunks of trees. 
Rhizome much branched, long, wiry, creeping. Fronds variable in 
size, 4-3 in. long, 4-1 in. broad, oblong or linear-oblong, pale-green, 
membranous, pinnate below, pinnatifid above. Stipes 4-ldin. 
long, slender, wiry, naked; rhachis winged above, wingless below, 
or sometimes the wing is decurrent almost to the lowest pinna. 
Pinnz spreading, close or rather remote, usually flabellately 
pinnatifid. Segments 3-12 to a pinna, linear, obtuse, flat, con- 
spicuously spinulose-dentate. Sori terminal on a short lateral seg- 
