Polypodium diminutum Baker in W.J.Hooker & J.G.Baker, Syn. Fil. 2nd edn, 507 (1874).T: Lord Howe Island, C.Moore ; holo: K. The epithet comes from the Latin diminutio (to decrease, diminish), in allusion to the tapered frond base.
Polypodium howeanum Watts, J. Proc. Roy. Soc. New South Wales 49: 388 (1915).T: Lord Howe Island, W.W.Watts; holo: NSW.
[Polypodium australe auct. non (R.Br.) Mett.: F.J.H. von Mueller, Fragm. 9: 78 (1875), p.p.]
T: Lord Howe Island, coll. unknown, 'No. 908,302.93'; holo: L n.v. The epithet comes from the Latin nudus (naked) and the Greek carpos (fruit), in allusion to the sporangia not bearing hairs.
Illustration: E.B.Copeland, Philipp. J. Sci. 80: 143, fig. 15 (1952).
Very small epiphyte. Rhizome short; scales on apex relatively short, long-pointed, dark brown. Fronds simple; stipe merging shortly and imperceptably into attenuate base of lamina, setose; lamina very narrowly oblanceolate, 2–8 cm long, 0.3–0.8 cm broad, entire, relatively abrupt, rounded and blunt at apex, setose with fine, dark brown hairs 0.5–2 mm long throughout; veins obscure. Sori elliptic, in 1 row on each side of midrib, usually throughout entire length of frond, with dark setose hairs.
Lord Howe Is. Endemic. Rare and confined to the summit areas on Mts Gower and Lidgbird.
Found only in densely shaded areas.
L.H.Is.: E side of Mt Lidgbird, J.C.Game 69/182 (K); E side of Mt Lidgbird, M.M.J. van Balgooy 1097 (L, NSW); summit of Mt Gower, J.P.Fullagar & Lind 21 p.p. (K).
Polypodium pulchellum Watts, J. Proc. Roy. Soc. New South Wales 49: 386 (1916), non Salisb. (1796).T: upper slopes of Mt Gower, Lord Howe Island, W.W.Watts?; holo: NSW; iso: K. Named after the Rev. W.W.Watts (1856–1920), prominent Australian cryptogamist about the turn of the century.
[Polypodium hirtum auct. non (Blume) C.Presl: W.J.Hooker in W.J.Hooker & J.G.Baker, Syn. Fil. 320 (1864), p.p.]
[Polypodium hookeri auct. non Brack.: F.J.H. von Mueller, Fragm. 7: 104 (1870); G.Bentham, Fl. Austral. 7: 104 (1878), p.p.]
Illustration: E.B.Copeland, Philipp. J. Sci. 80: 143, fig. 14 (1952).
Epiphyte. Rhizome erect or shortly creeping; scales dense, narrow, long-pointed, chestnut-brown. Fronds simple; stipe 0.5–5 cm long, merging imperceptably into attenuate base of lamina, densely setose with chestnut-brown hairs 2–4 mm long; lamina very narrowly elliptic-linear, 5–20 cm long, 0.4–1.2 cm broad, entire, gradually narrowed at apex, tip blunt, setose throughout with fine, dark or chestnut-brown hairs, especially on margins; veins obscure. Sori round to elongate-elliptic, 1 row on each side of midrib throughout length of frond, with denser groups of setose hairs.
Lord Howe Is. Endemic. Confined to the tops of Mts Gower and Lidgbird.