14 FILICES. [Hymenophyllum. 
decurved. Sori free, almost stipitate.—H. cupressiforme Labill. Pl. Nov. Holl. ii (1806) 
102, t. 250. H. revolutum Col. in Tasm. Journ. Nat. Sci. (1846) 186. 
Nortu anp Sours Isuanps, Stewart IsLAND, AUCKLAND IsLANDS: Abundant 
throughout. Sea-level to 3000 ft. 
An abundant plant in most temperate and subtropical countries, and everywhere 
highly variable. Var. cupressi/orme has much of the habit of the next species, but the 
valves of the indusium aye deen ual: 
CYA ; 
* 18. H. peltatum Desv. Prodr. (1827) 333.—Forming large patches on 
the ground among moss or on the roots of trees. Rhizome long, creeping, 
branched. Fronds 1-4in. long, linear-cblong, dark-green, rigidly mem- 
branous, pinnate below, pinnatifid above. Stipes }-12in. long, slender, 
wiry, naked ; rhachis winged in the upper portion only. Pinnae narrower 
and more rigid than in H. Tunbridgense, often pinnatifid on the upper side 
alone. Segments fewer and narrower, frequently decurved, usually involute, 
margins conspicuously spinulose-dentate. Sori terminal on short lateral 
segments near the base of the pinnae on their upper margin, exactly as in 
H. Tunbridgense. Indusium obovate-oblong or broadly oblong, turgid, 
slightly immersed at the base, deeply 2-valved; valves smooth ; mares 
quite entire.—H. unilaterale Willd. Sp. Plant. v (1810) 521; Hook. f. Fl. 
Nov. Zel. ii (1855) 11; Handb. N.Z. Fl. (1864) 353; Cheesem. Man. N.Z. 
Fl. (1906) 940. HH. Wilsoni Hook. Brit. Fl. edit. 1 (1830) 446; Sp. Fil. i 
(1846) 95. H. Tunbridgense var. Wilsoni Hook. and Bak. Syn. Fil. (1873) 67. 
NortH anp Sovutn Isianps, Stewart Istanp: From Te Aroha Mountain south- 
wards, not common, chiefly in mountain forests. Sea level to 3500 ft. 
Very closely allied to H. Tunbridgense, and sometimes hardly to be distinguished 
from it in the absence of fruit, but usually the frond is taller and narrower and more 
rigid, the pinnae are sparingly divided and decurved, the segments often unilateral, 
and the indusia narrower and more turgid, with the margins of the valves quite entire. 
Its geographical range is nearly the same as that of H. T'unbridgense, but it is a much 
less abundant plant. X ¢ 
19. H. multifidum Swartz Syn. Fil. (1806) 149.—Forming matted 
patches upon the ground or on the trunks or branches of trees. Rhizome 
much branched, creeping, wiry. Fronds variable in size, usually 4-8 in. 
high including the stipes, but sometimes dwarfed to 1 in., and occasionally 
attaining 12in., ovate-lanceolate to oblong-ovate or deltoid, acute or 
acuminate, erect or decurved or even pendulous, dark olive-green to light- 
green, membranous, 3-4-pinnatifid. Stipes 1-5 in. long, terete, wiry, naked ; 
rhachis narrowly winged above. Primary pinnae close and often over~ 
lapping in terrestrial specimens, more remote in those growing on trees, 
rhomboidal-lanceolate, cut down to a rather broadly winged rhachis into 
numerous secondary divisions, which are again pinnatifid or 2-pinnatifid. 
Ultimate segments linear, rigid, obtuse, deeply spinulose-dentate. Sori few, 
large, mostly in the upper part of the frond, terminating very short latera! 
segments, often appearing quite axillary, free. Indusium erect or decurved, 
obovoid, tubular below, 2-valved to the middle; valves entire or denti- 
culate——A. Cunn. Precur. (1836) n. 240; Raoul Choix (1846) 39; Hook. 
and Grev. Ic. Fil. (1829) t. 167; Hook. Sp. Hil. i (1846) 98; Hook. f. Fl. 
Nov. Zel. 1 (1855) 12; Handb. N.Z. FI. (1864) 3538; Hook. and Bak. Syn. 
Fil. (1873) 69; Cheesem. Man. N.Z. Fl. (1906) 940; Thoms. N.Z. Ferns 
(1882) 37; Held N.Z. Ferns (1890) t. 19, f. 8. H. truncatum Col. in 
Trans. N.Z. Inst. xxiii (1891) 390. H. alpinum Col. lic. xxxi (1899) 263. 
H. oligocarpum Col. l.c. xxxi (1899) 264. Trichomanes multifidum Forst. fi 
Prodr. (1786) 85. 
