P. S. Green Royal Botanic Gardens, Kew, Richmond, Surrey, tw9 3AB, England



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Very common in drier parts of forests on Norfolk Is.

N.Is.: beside Red Rd, P.S.Green 1373 (A, K); between Palm Glen and Red Rd, R.J.Chinnock 5961 (AD, K); E slopes of Mt Bates, R.D.Hoogland 11252 (CANB, K, NSW); Rooty Hill Rd, R.D.Hoogland 11297 (CANB, NSW). L.H.Is.: E side of Intermediate Hill, J.C.Game 69/297 (K).

On Norfolk Is. it is sometimes infected with the gall-forming fungus, Taphrina cornu-cervi Gissenhagen.

gen.
DRYOPTERIDACEAE
33. POLYSTICHUM

PolystichumRoth
Tent. Fl. Germ. 1: 31, 69(1799)
from the Greek poly (many) and stichos (a row), alluding to the many rows of sori in these ferns

Type: P. lonchitis (L.) Roth

Terrestrial or lithophytic ferns. Rhizome short, densely scaly. Stipes erect or arching, usually densely scaly, especially at base, not articulated to rhizome. Fronds 1–3-pinnate, rarely simple; pinnules unequal at base, ±auriculate, serrate to spinulose; veins free; groove of rachis and costae above glabrous or with long hairs and occasional narrow scales. Sori round, dorsal or subterminal on veins; indusia centrally peltate, sometimes caducous, rarely lacking.

A large, cosmopolitan genus of 135 or more species; in the tropics it is usually confined to the high mountains. Two species endemic to Lord Howe Is.

G.Bentham, Filices, Aspidium, Fl. Austral. 7: 757–758 (1878).

Fronds with dense, light brown scales, especially towards base of stipe, without arachnoid hairs, but rachis and costae minutely glandular; lamina outline lanceolate, 10–25 cm long, 7–14 cm broad; pinnules ovate, obtuse; indusia dome-shaped

1. P. moorei

Fronds with dense, brown scales on rachis and costae mixed with easily rubbed-off arachnoid hairs; lamina outline deltoid, (15–) 25–40 cm broad; pinnules lanceolate, acute or deltoid; indusia ±funnel-shaped

2. P. whiteleggei



1
Polystichum
mooreiH.Christ
Arkiv Bot. 4(12):
3 (1903)

T: Lord Howe Island, 1892, J.H.Maiden and 'E.Kirk' [E.King] 42; syn: P. Named after Charles Moore (1820–1905), Director of the Royal Botanic Gardens, Sydney (1848–1896), who collected on Lord Howe Is. in 1869.

Aspidium aculeatum var. moorei H.Christ ex Maiden, Proc. Linn. Soc. New South Wales 23: 146 (1898); Polystichum moorei (H.Christ ex Maiden) W.R.B.Oliv., Trans. & Proc. New Zealand Inst. 47: 120 (1917), nom. illeg.T: eastern side of Mt Lidgbird, Lord Howe Is., E.King; holo: NSW.

Polystichum kingii Watts, Proc. Linn. Soc. New South Wales 37: 401 (1913).T: eastern side of Mt Lidgbird, Lord Howe Island, 1895, E.King; syn: NSW; in a cave, Mt Lidgbird, 1911, E.King; syn: NSW; mouth of Soldiers Creek, 1898, J.H.Maiden; syn: NSW.

Polystichum kingii f. umbrosa Watts, op. cit. 403, nom. prov.T: Lord Howe Island, collector not specified; holo: ?NSW n.v.

Polystichum moorei var. tenerum Watts, Proc. Linn. Soc. New South Wales 39: 258 (1914).T: mouth of Soldiers Creek, Lord Howe Island, [1898], J.H.Maiden; syn: ?NSW n.v.; isosyn: P; base of Mt Gower, Lord Howe Island, 1911, E.King; syn: ?NSW n.v.; isosyn: P.


Terrestrial or lithophytic ferns. Rhizome short; scales dense, lanceolate, to 2 cm long, 2–5 mm broad, long-acute, brown. Fronds 3-pinnate or 2-pinnatisect; stipe 2–12 cm long; scales on stipe numerous, similar to those on rhizome, to 1.5 cm long, especially dense towards base; rachis with scattered, linear-lanceolate, brown scales to 1 cm long, especially towards base, and minute glandular hairs; lamina lanceolate in outline, 10–25 cm long, 7–14 cm broad; pinnules obliquely ovate, 0.5–2 cm long, with apices obtuse, bluntly serrate; veins not visible above. Sori ±dome-shaped, 1.5–2 mm diam., glandular; indusia orbicular.

Fig. 106F–H.v*****_f*****.jpg

Lord Howe Is. Endemic. Found near Mts Gower and Lidgbird.

Rare in rocky habitats near and around the bases of Mts Gower and Lidgbird.

L.H.Is.: E side of Mt Lidgbird, E.King s.n. (NSW); loc. id., 1920, J.L.Boorman (NSW); Tableland, J.Pickard 3633 (NSW); W base of Mt Gower, 1913, W.R.B.Oliver (NSW, P).


2
Polystichum
whiteleggeiWatts
Proc. Linn. Soc. New South Wales 39: 258(1914)


T: [slopes of Mt Lidgbird], Lord Howe Is., [1911], W.W.Watts; holo: NSW; iso: BRI. Named after Thomas Whitelegge (1850–1927) of the Australian Museum, who collected zoological specimens on the Island in 1887, and who first pointed out the distinctiveness of this fern.

[Aspidium aculeatum auct. non (L) Sw.: F.J.H. von Mueller, Fragm. 9: 78 (1875)]

[Aspidium capense auct. non (L.f.) Willd.: G.Bentham. Fl. Austral. 7: 758 (1878); W.B.Hemsley, Ann. Bot. (London) 10: 265 (1896)]

[Polystichum moorei auct. non H.Christ: W.W.Watts, Proc. Linn. Soc. New South Wales 37: 399–401 (1913)]


Illustration: D.L.Jones, Encycl. Ferns 299 (1987).

Terrestrial or lithophytic ferns, ±tufted. Rhizome shortly creeping; scales on apex dense, lanceolate, to 2 cm long, 3–4 mm broad, long-acute, dark brown. Fronds 3-pinnate; stipe (5–) 10–50 cm long; scales on stipe similar to those on rhizome, to 1.5 cm long, especially towards base; lamina deltoid in outline, (10–) 15–50 cm long, (7–) 12–40 cm broad, somewhat coriaceous; rachis and costae with usually dense, lanceolate scales to 7 mm long, with non-glandular arachnoid hairs between which are easily rubbed off; pinnules lanceolate, 1–2 cm long, irregularly bluntly serrate with apex bluntly acute and veins just visible above. Sori often almost covering lower surface; indusia ±funnel-shaped, 1–2 mm diam., without glands, caducous.

Fig. 106I–K.v*****_f*****.jpg

Lord Howe Is. Endemic. Locally common to rare onMts Gower and Lidgbird.

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