3. T. humile, Forst. Prodr. n. 464.—Small, pendulous from the faces of rocks or bank-sides. Rhizomes much branched, slender, creeping, intermatted. Stipes short, slender, ¼–½ in. long, winged almost to the base. Fronds 1–3 in. long, ¾–1½ in. broad, lanceolate or linear-oblong, quite glabrous, membranous, dark dull-green, irregularly 2-pinnatifid; rhachis winged throughout. Pinnæ ascending, forked or again pinnatifid. Ultimate segments linear, flat, obtuse, quite entire, a single costa in each segment, spurious venules wanting. Sori solitary, sunk in the tip of a short lateral segment and on the upper side of a pinna near its base. Indusium tubular or trumpet-shaped; mouth expanded, shortly 2-lipped. Receptacle usually exserted as a long capillary bristle.—Hook. and Grev. Ic. Fil. t. 35; Hook. Sp. Fil. i. 123; Hook. f. Fl. Nov. Zel. ii. 16; Handb. N.Z. Fl. 356; Hook. and Bak. Syn. Fil. 80; Thoms. N.Z. Ferns, 46; Field, N.Z. Ferns, 70, t. 5, n. 8.
North Island: From the North Cape southwards, not uncommon in dark woods. South Island: Nelson—Happy Valley, A. Grant. Marlborough—Queen Charlotte Sound, Banks and Solander. Canterbury—Banks Peninsula, Armstrong. Sea-level to 2000 ft.
Also in Java and the Pacific islands.
4. T. venosum, R. Br. Prodr. 159.—Pendulous, usually clothing the trunks of tree-ferns. Rhizome long, slender, branched, wide-creeping, densely tomentose. Stipes ½–2 in. long, very slender, capillary, naked. Fronds 1–4 in. long, ¾–1½ in. broad, linear or lanceolate to oblong, very delicate and membranous, translucent, pale-green, shining, quite glabrous, pinnate; rhachis broadly winged above, naked below. Pinnæ 4–8 pairs, very variable in shape and amount of cutting, from linear and undivided to rhomboidal-lanceolate and deeply and irregularly pinnatifid. Segments or lobes flat, obtuse, irregularly sinuate; costa flexuous, with numerous alternate once or twice dichotomous secondary veinlets. Sori generally solitary on each pinna and sunk in a short lobe on the upper margin near the base, but in specimens with broad lower pinnæ there may be 2–4 sori placed irregularly on both the upper and lower margins. Indusium tubular; mouth dilated all round, entire or very slightly 2-lipped. Receptacle usually exserted, capillary.—A. Cunn. Precur. n. 229; Raoul, Choix, 38; Hook. Syn. Fil. i. 132; Hook. and Grev. Ic. Fil. t. 78; Hook. f. Fl. Nov. Zel. ii. 17; Handb. N.Z. Fl. 357; Hook. and Bak. Syn. Fil. 82; Benth. Fl. Austral. vii. 702; Thoms. N.Z. Ferns, 47; Field, N.Z. Ferns, 71, t. 14, f. 4. T. venustulum. Col. in Trans. N.Z. Inst. xii. (1880) 366.
Kermadec Islands, North and South Islands, Stewart Island, Chatham Islands: Abundant in moist forests throughout. Sea-level to 2500 ft.
Also in south-eastern Australia and Tasmania. Mr. Colenso's T. venustulum is simply a small state with broader lower pinnæ sometimes bearing 2–4 sori.
