L.H.Is.: near the Goat House, R.D.Hoogland 8809 (NSW); E slopes of Mt Lidgbird, P.S.Green 1689 (A, NSW); Erskine Valley, A.C.Beauglehole 5741 (A, BRI, MEL); slopes of Mt Gower, 1911, W.W.Watts (BRI, NSW); summit of Mt Gower, P.S.Green 1652 (A, NSW).
Lastreopsis microsora (Endl.) Tindale was included by S.F.L.Endlicher in his Prodromus Florae Norfolkicae (1833) on p. 9, as Nephrodium microsorum, citing a collection from Norfolk Is. made by F.L.Bauer, but this specimen fits his description of N. calanthum, while his description of N. microsorum fits the Australian collection by F.W.Sieber which he also cites. M.D.Tindale (Victorian Naturalist 73: 182, 1957) has typified N. microsorum on this Sieber material.
P.S.GreenRoyal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, England
Terrestrial or epiphytic ferns. Rhizome erect, creeping or climbing, densely covered with scales. Fronds simple or pinnate, usually articulate with rhizome. Pinnae entire or deeply lobed, articulate with rachis. Veins usually free, rarely confluent, usually ending near margin in a hydrathode. Sori dorsal or submarginal; indusia reniform or sometimes peltate, rarely lacking.
A pantropical family of c. 9 genera and c. 200 species; 2 genera native on the Islands.
Rhizome creeping or climbing; stipe articulate to rhizome
NephrolepisSchott Gen. Fil. 1: t. 3(1834) from the Greek nephros (a kidney) and lepis (a scale), in allusion to the kidney-shaped indusia in the type species
Type: N. exaltata (L.) Schott
Terrestrial or sometimes epiphytic ferns. Rhizome short, erect; scales peltate at base. Fronds pinnate; stipe tufted, not articulate to rhizome; lamina long and narrow; pinnae usually crowded, articulate to rachis, asymmetrical at base, usually crenate; veins free, simple or forked. Sori usually circular in a single row on each side of costae, terminal on a vein, dorsal or near margin; indusia reniform.
A pantropical genus of c. 30 species; 1 species native to both Islands.
It has also been treated as a monotypic family of its own, the Nephrolepidaceae.
Polypodium cordifolium L., Sp. Pl. 2: 1089 (1753); Aspidium cordifolium (L.) Sw., J. Bot. (Schrader) 1800(2): 32 (1801).T: Petiver, Pter.-Americana t. 1, fig. 11 (1712). The epithet comes from the botanical Latin cordatum (heart-shaped) and folium (a leaf), in allusion to the heart-shaped pinnae depicted in an early drawing of this species.
Aspidium tuberosum Bory ex Willd., Sp. Pl. 5: 234 (1810); Nephrolepis tuberosa (Bory ex Willd.) C.Presl, Tent. Pterid. 79 (1836).T: Réunion, J.B.G.M.Bory de St. Vincent s.n.; holo: B n.v., IDC microfiche 7740/1.1427/13.
Terrestrial fern. Rhizome with numerous, narrow, attenuate, light brown scales. Fronds pinnate, erect; stipe 5–10 cm long, with narrow scales becoming linear above; lamina 30–50 cm long, 2–4.5 cm broad; rachis with narrow, linear scales; pinnae closely adjacent, subsessile, deltoid-oblong, 10–25 mm long, 5–9 mm broad, unequally cordate at base, shortly auriculate, the lobes overlapping the rachis, shallowly crenate; veins terminating in submarginal hydrathodes on upper surface. Sori in a single row on each side of costae.
Pop-Rock Fern (N.Is.).
Norfolk Is., Lord Howe Is. Also known from Australia, New Zealand and New Caledonia, probably pantropical, but much cultivated and possibly naturalised in some places.
Local on Norfolk Is.; common in rocky habitats on Lord Howe Is.
N.Is.: s. loc., C.J.Simmons (K); s. loc., V.Thomson (K). L.H.Is.: ascent of Mt Gower, P.S.Green 1608 (K); W side of Mt Lidgbird, J.C.Game 69/191 (K); s. loc., C.Moore 27 & 73 (K).
W.R.Sykes in Kermadec Is. Fl. 68 (1977) suggests that on Norfolk Is. the native plants differ from the naturalised plants (found near dwellings and known as the Fishbone Fern). As on North Is., New Zealand, the matter needs investigation; the native plant is treated and described as Nephrolepis aff. cordifolia in Fl. New Zealand 4: 14 (1988) and by P.J.Brownsey & J.C.Smith-Dodsworth, New Zealand Ferns & Allied Pl. 137, fig. 172, t. 31F (1989).
ArthropterisJ.Sm. ex Hook.f. Fl. Nov.-Zel. 2: 43, t. 82(1854) from the Greek arthron (a joint) and pteris (a fern), in reference to the joint, or articulation, at the base of the pinnae
Type: A. tenella (G.Forst.) J.Sm. ex Hook.f.
Epiphytic or lithophytic fern. Rhizome slender, long creeping or climbing, scaly; scales with toothed margins. Fronds pinnate, small to medium sized; stipes remote, articulate to rhizome at base; rachis with multiseptate hairs and often scales; pinnae articulate to rachis, entire or lobed; veins free, bifurcating. Sori circular, in 1 row on each side of pinnae below, often submarginal; indusia reniform or lacking.
A genus of c. 20 species from tropical Africa through southern Asia to Australia, New Zealand and the Pacific islands (including Juan Fernandez); 1 species native to both Islands.
tenella(G.Forst.) J.Sm. ex Hook.f. Fl. Nov.-Zel. 2: 43, t. 82(1854)
Polypodium tenellum G.Forst., Fl. Ins. Austr. 81 (1786).T: s. loc. [New Zealand?], J.R. & G.Forster; lecto: BM, fide M.D.Tindale, Contr. New South Wales Natl. Herb. Fl. Ser. 208: 9 (1961). The epithet is from the Latin tenellus (somewhat delicate), in allusion to the habit.
Illustrations: D.L.Jones & S.C.Clemesha, Austral. Ferns & Fern Allies 2nd edn, 81, fig. 64 (1981); P.J.Brownsey & J.C.Smith-Dodsworth, New Zealand Ferns & Allied Pl. 135, fig. 170, t. 31A, B (1989); S.B.Andrews, Ferns Queensland 245, fig. 23.1A (1990).
Epiphytic or lithophytic fern. Rhizome climbing, elongated, covered with narrow, overlapping, brown scales, attached just above their rounded bases, and mixed with smaller scales and hairs. Fronds: stipe articulated at base, 3–8 cm long, with scales becoming sparser upwards; rachis with occasional, smaller scales and shorter hairs; lamina 8–30 cm long; pinnae 4–14 per side, lanceolate, 3–6 cm long, 0.8–1.3 cm broad, very shortly stalked, articulate and ±asymmetrical at base, crenate to almost entire (sterile pinnae), acuminate. Sori circular, submarginal, 10–20 per side, without indusia.
Norfolk Is., Lord Howe Is. Also known from Australia (Qld, N.S.W.), and New Zealand.