Occurs in heavily shaded valleys in the National Park.
N.Is.: Now-Now Valley, R.D.Hoogland 11256 (NSW); Cascade, P.Ralston 65 (NSW); s. loc., P.H.Metcalfe (CHR, K).
Terrestrial or lithophytic ferns. Rhizome erect or creeping; scales usually non-clathrate. Fronds usually 2–4-pinnate, rarely simple; stipe with scales or multicellular hairs; rachis and costae scaly or with multicellular hairs; pinnules asymmetrical; veins free or netted. Sori round, on veins or ends of veins; indusia peltate or reniform, rarely absent.
A family of perhaps 45 genera and c. 150 species, whose classification is still unsettled. It is distributed throughout the world; 2 native genera on Norfolk Is., 3 genera (1 introduced) on Lord Howe Is.
KEY TO GENERA
1 Fronds once pinnate
1: Fronds 2- or 3-pinnate
2 Margins of pinnules sharply aristate-apiculate; scales at base of stipe narrowly lanceolate, 4–10 mm long, 0.2–0.8 mm broad; groove of rachis and costae above glabrous, or with very occasional narrow scales; indusia attached laterally
2: Margins of pinnules not sharply aristate-apiculate
3 Scales at base of stipe lanceolate, 10–20 mm long, 1.5–3.5 mm broad; groove of rachis and costae above glabrous, or with long hairs and occasional narrow scales; indusia attached centrally
3: Scales at base of stipe linear to narrowly elongate-triangular, 2–20 mm long, 0.5–2 mm broad; groove of rachis and costae above with dense, short hairs; indusia attached laterally
PhanerophlebiaC.Presl Tent. Pterid. 84(1836) from the Greek phaneros (evident) and phlebia (a vein), in allusion to the obvious vein in the pinnae of the first species included in this genus
Type: P. nobilis (Schltdl. & Cham.) C.Presl
Terrestrial fern. Rhizome short, ±erect, with dense, broad scales. Fronds pinnate, often pinnatifid at apex; pinnae often falcate, usually with sharp teeth at margin, usually acuminate; veins usually anastomosing, sometimes free. Sori circular, scattered on underside of pinnae on veins, sometimes terminal on them; indusia peltate, persistent or caducous.
A genus of c. 20 species, distributed from Hawai'i, Japan and tropical Asia to southern Africa and Central and South America; 1 species naturalised on Lord Howe Is.
falcata(L.f.) Copel. Gen. Fil. 111(1947)
Polypodium falcatum L.f., Suppl. Pl. 446 (1781); Cyrtomium falcatum (L.f.) C.Presl, Tent. Pterid. 86 (1836).T: Japan, C.P.Thunberg; holo: ?UPS n.v. The epithet is Latin for sickle-shaped, in allusion to the shape of the pinnae.
Illustrations: D.L.Jones, Encycl. Ferns: 18, 37, 287 (1987); S.B.Andrews, Ferns Queensland 23, fig. 3.3A (1990); P.G.Wilson in G.J.Harden, Fl. New South Wales 1: 59 (1990); all as Cyrtomium falcatum.
Tufted fern. Fronds pinnate; stipe 10–30 cm long, with broad, brown scales, especially at base; lamina 15–30 cm long, 8–20 cm broad; pinnae ovate-falcate, asymmetrical, often with a short, acute lobe at base, especially on side nearest rachis, rounded at base, finely sharp-toothed at margin, long-acuminate. Sori scattered, circular; indusia peltate.
Lord Howe Is. A native of Japan, this species is often cultivated as a house plant in temperate regions or in gardens in warmer climates. It has become naturalised after having been discarded from cultivation.
L.H.Is.: Anderson Rd, A.N.Rodd 3605 (NSW).
ArachniodesBlume Enum. Pl. Jav. 241(1828) from the Greek arachniodes (like a spider's web), in allusion to the indumentum of the fern
Type: A. aspidioides Blume
Terrestrial ferns. Rhizome erect or creeping, clothed with scales at base. Fronds 2–4-pinnate, generally 3-pinnate; glabrous or with very occasional narrow scales; pinnules usually unequally sided at base, with or without stiff marginal hairs; veins free, not reaching margin. Sori round, dorsal or submarginal on veins; indusia orbicular-reniform, with a deep sinus, attached laterally, rarely lacking.
A genus of c. 50 species, widespread in the tropics and subtropics, but especially found in the Sino-Himalayan region; 1 species native to the Islands.
M.D.Tindale, Contr. New South Wales Natl. Herb. 3: 89–90 (1961); M.D.Tindale, Contr. New South Wales Natl. Herb. Fl. Ser. 211: 55–59 (1961).
aristata(G.Forst.) Tindale Contr. New South Wales Natl. Herb. 3: 89(1961)
Polypodium aristatum G.Forst., Fl. Ins. Austr. 82 (1786); Aspidium aristatum (G.Forst.) Sw., J. Bot. (Schrader) 1800(2): 37 (1801); Polystichum aristatum (G.Forst.) C.Presl, Tent. Pterid. 83 (1836).T: Tahiti, J.R. & G.Forster; syn: BM. The epithet is Latin for awn, in reference to the aristate-apiculate tips to the pinnules.
Rhizome long-creeping, densely clothed with narrowly lanceolate, finely pointed scales 4–10 mm long, 0.2–0.8 mm broad. Fronds drooping, 3- or 4-pinnatifid; lamina deltoid; stipes remote, 20–60 cm long, scaly at base with linear scales above; lamina 20–40 cm long, 15–25 cm broad; basal pinnules of lowermost pinnae larger than others; pinnule apex and segments sharply aristate-apiculate. Sori in a single row on each side of costules; indusia orbicular-reniform.
Prickly Shieldfern (N.Is.).
Norfolk Is., Lord Howe Is. On Lord Howe Is. known from only one collection. Distributed from SE Asia to Australia (Qld & N.S.W.), the Kermadec Islands and Polynesia.