Elaphoglossum marginatum (Wall ex Fée) T.Moore

Family

Dryopteridaceae

Nomenclature

Elaphoglossum marginatum (Wall ex Fée) T.Moore, Ind. Fil.: 11. 1857; T.Moore, Ind. Fil.: 361. 1862; Sledge, Bull. Brit. Mus. (Nat. Hist.) Bot. 4: 89. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 307. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 186. 2000. – Acrostichum marginatum Wall. ex Fée, Hist. Acrost.: 31. 1845.

Elaphoglossum conforme auct. non (Sw.) Schott: Bedd., Handb. Ferns Brit. India: 416, f. 247. 1883, p.p.;. Hosseus, Beih. Bot. Centralbl. 28(2): 363. 1911; C.Chr., Contr. U.S. Natl. Herb. 26: 335. 1931; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 541. 1941; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 90. 1967.

Elaphoglossum sp.: Holttum, Dansk Bot. Ark. 20: 29. 1961.

Description

Rhizome very, short, bearing very close fronds; scales brown or darker, linear, up to 7 by 2 mm, with irregular projections at margin. Sterile frond: stipe up to 8 cm long, stramineous, narrowly winged, densely scaly at base with scales like those on rhizome, sparsely clad with narrower scales above; lamina oblong-lanceolate, up to 30 by 3.7 cm, gradually narrowing towards acute apex, the base narrowly round or attenuate, decurrent to wings of stipe, marginal cartilaginous membrane up to 1 mm wide, usually involute; midrib raised on both surfaces, sparsely scaly underneath, veins forked, parallel, hardly visible; coriaceous, green, minutely scaly on both surfaces. Fertile frond: stipe up to 20 cm long; lamina about 25 by 2.5 cm.

Distribution in Thailand

NORTHERN: Chiang Mai, Lampang, Phitsanulok; NORTH-EASTERN: Loei; CENTRAL: Nakhon Nayok.

Wider Distribution

N India, Yunnan, Indochina and Taiwan.

Ecology

On mossy tree trunks in dense forests at high altitudes (1200–2200 m alt.).

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread and not under any known threat.

Voucher specimens - Thailand

Middleton et al. 5140, Loei, Phu Luang Wildlife Sanctuary (E).
Habit

Habit

Habit

Habit

Rhizome and scales

Rhizome and scales

Scales on rhizome

Scales on rhizome

Upper surfaces of fertile (top) and sterile (bottom) fronds

Upper surfaces of fertile (top) and sterile (bottom) fronds

Stipe and base of fertile lamina

Stipe and base of fertile lamina

Lower surface of fertile frond

Lower surface of fertile frond

Sori

Sori

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