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