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



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Found on the flanks and edges of the summits of Mts Gower and Lidgbird.

L.H.Is.: N flank of Mt Lidgbird, M.M.J. van Balgooy 1148 (CANB, NSW); loc. id., R.D.Hoogland 8758 (CANB, NSW); E slopes of Mt Lidgbird, P.S.Green 1687 (A, K, NSW); Erskine Valley, A.N.Rodd 1701 (NSW); N ridge of Mt Gower, J.Pickard 2641 (NSW).

In the past a common name, Heavy Fern, has been used for this species, alluding to the weight of a fully developed, thick textured, frond with its dense indumentum of scales.

gen.
DRYOPTERIDACEAE
44. LASTREOPSIS

LastreopsisChing
Bull. Fan Mem. Inst. Biol. 8: 157(1938)
from Lastrea, a related genus, and the Greek suffix -opsis (similar to)

Type: L. tenera (R.Br.) Tindale = L. recedens (J.Sm. ex T.Moore) Ching

Terrestrial or epiphytic ferns. Rhizome creeping or rarely erect, clothed with narrow scales. Fronds 3- or 4-pinnate, outline generally deltoid; costae grooved above and confluent with the rachis groove, both with dense and short hairs. Upper basal pinnule lobe nearest the costa usually larger than the lower; veins free, sometimes reaching the margin. Sori round, dorsal or terminal on veinlets; indusia usually present, usually reniform.

A genus of c. 33 species, widespread in the tropics, reaching temperate areas in Tasmania and New Zealand; 1 endemic species on each Island.

G.Bentham, Filices, Deparia, Fl. Austral. 7: 714 (1878); M.D.Tindale, A monograph of the genus Lastreopsis Ching, Contr. New South Wales Natl. Herb. 3: 249–339 (1965).

Rhizome long-creeping; stipe base with relatively few scattered dark brown scales to 0.6 cm long; margins of pinnules dentate; sori medial (N.Is.)

1. L. calantha

Rhizome scarcely creeping; stipe base with dense, very dark brown scales to 2 cm long; margins of pinnules crenate; sori medial to marginal, often on tip of a short marginal projection (L.H.Is.)

2. L. nephrodioides



1
Lastreopsis
calantha(Endl.) Tindale
Victorian Naturalist 73: 184(1957)


Nephrodium calanthum Endl., Prodr. Fl. Norfolk. 9 (1833).T: Norfolk Is., 1804–1805, F.L.Bauer; holo: W. The epithet comes from the Greek calos (beautiful) and anthos (flower), presumably in reference to the attractive appearance of this fern.

Nephrodium microsorum Endl., loc. cit., p.p., quoad spec. ins. Norfolk.

[Aspidium coriaceum auct. non (Sw.) Sw.: S.F.L.Endlicher, op. cit. 8]

[Aspidium capense auct. non Willd.: J.H.Maiden, Proc. Linn. Soc. New South Wales 28: 736 (1904)]

[Aspidium decompositum auct. non (R.Br.) Spreng.: J.H.Maiden, op. cit. 736]

[Aspidium tenerum auct. non Spreng.: J.H.Maiden, op. cit. 737]

[Polystichum adiantiforme auct. non (G.Forst.) J.Sm.: R.M.Laing, Trans. & Proc. New Zealand Inst. 47: 11 (1915)]

[Lastreopsis decomposita auct. non (R.Br.) Tindale: M.D.Tindale, Contr. New South Wales Natl. Herb. 3: 321 (1965), p.p.]

[Rumohra adiantiformis auct. non (G.Forst.) Ching: J.S.Turner et al., Conservation Norfolk Is. 30 (1968)]


Terrestrial fern. Rhizome long-creeping, decumbent at apex; rhizome and base of stipe covered with narrowly elongate, triangular, dark brown scales 2–6 mm long, 0.5–1 mm broad at base. Fronds 3-pinnate to 4-pinnatisect, erect; stipes borne 1–2 cm apart, 15–30 (–50) cm tall, with scattered scales at base like those on rhizome; lamina 20–50 (–70) cm long, 15–50 cm broad; pinnules 1–5 cm long, 0.5–1.5 cm broad, dentate, not aristate. Sori medial; indusia reniform, 0.5–0.75 mm diam., with a few glandular hairs 0.1 mm long.

Shieldfern.

Fig. 106L–M.v*****_f*****.jpg

Norfolk Is. Endemic.

Fairly common in shaded forest.

N.Is.: SE slope just below summit of Mt Bates, 1962, P.Ralston (NSW); between Palm Glen and Red Rd, R.J.Chinnock 5960 (AD, K); s. loc., 1964, P.Ralston (NSW); s. loc., W.G.Milne 13 (K); s. loc., 1849, C.J.Simmons (BM, K).

Closely related to L. microsora (Endl.) Tindale from Australia and New Zealand.


2
Lastreopsis
nephrodioides(Baker) Tindale
Victorian Naturalist 73: 184(1957)


Deparia nephrodioides Baker, Gard. Chron. 32: 253 (1872); Davallia nephrodioides (Baker) F.Muell., Fragm. 10: 104 (1877); Dicksonia nephrodioides (Baker) F.Muell., Fragm. 9: 78 (1875); Dryopteris decomposita var. nephrodioides (Baker) Watts, Proc. Linn. Soc. New South Wales 37: 397 (1913); Dryopteris nephrodioides (Baker) Watts, Proc. Linn. Soc. New South Wales 39: 259 (1914), non (Hook.) Kuntze, nec (Klotsch) Hiron.; Ctenitis nephrodioides (Baker) F.Ballard, Kew Bull. 4: 559 (1955).T: Lord Howe Island, C.Moore 7; holo: K. Named from its resemblance to Nephrodium decompositum R.Br. (= Lastreopsis decomposita (R.Br.) Tindale).

Nephrodium apicale Baker in W.J.Hooker & J.G.Baker, Syn. Fil. 2nd edn, 499 (1874); Aspidium apicale (Baker) Benth., Fl. Austral. 7: 758 (1878); Ctenitis apicalis (Baker) F.Ballard, loc. cit.T: Lord Howe Island, C.Moore 28; holo: K.


Illustrations: J.G.Baker in W.J.Hooker, Icon. Pl. 17: t. 1608 (1886), as Deparia nephrodioides; M.D.Tindale, Contr. New South Wales Natl. Herb. 3: t. 11/3, 11/4 (1965).

Terrestrial or epiphytic fern. Rhizome scarcely creeping, suberect at apex; rhizome and base of stipe densely covered with linear, ±hair-pointed, very dark brown scales 1–2 cm long, 1–2 mm broad at base. Fronds 4-pinnate to 5-pinnatisect, erect, ±tufted; stipe 10–40 cm tall, with lower part bearing scales like those on rhizome; lamina 15–40 cm long, 20–50 cm broad; pinnules 1–4 cm long, 0.4–1.5 cm broad, crenate. Sori medial to marginal, often on the tip of a short marginal projection; indusia reniform, 0.5–1 mm diam., glabrous.

Fig. 106N–P.v*****_f*****.jpg

Lord Howe Is. Endemic.

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