Family

Dryopteridaceae

Nomenclature

Elaphoglossum angulatum (Blume) T.Moore, Index Filic.: 5. 1857; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 541. 1941; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 50. 1968; Holttum, Fl. Males., Ser. II, Pterid. 1: 297, f. 16b & 16c. 1978; Tagawa & K.Iwats., Fl. Thailand 3: 305, f. 25.1–25.3. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 185. 2000. – Acrostichum angulatum Blume, Enum. Pl. Javae.: 101. 1828.

Elaphoglossum latifolium auct. non J.Sm.: Bedd., Handb. Ferns Brit. India: 416. 1883.

Description

Rhizome long creeping, bearing fronds remotely, up to 3 mm diam., dark, scaly throughout; scales light-brown, membranous, ovate-oblong or more or less irregular in shape, up to 4 by 3 mm, concolorous and entire. Sterile frond: stipe 10–15 cm long, stramineous with dark base, very narrowly winged on upper part, densely scaly at base, scales more sparse upward, like those on rhizome; lamina oblong lanceolate, acute to acuminate at apex, gradually narrowing towards base, 12–20 cm long, 2–3.5 cm wide; midrib distinctly raised on both surfaces, naked or seldom scaly; veins simple or forked, parallel, more or less distinct on both surfaces, the apex ending inside the narrow cartilaginous strands at margin; coriaceous, deep-green, glabrous or very rarely minutely scaly on under surface of fronds. Fertile frond (not seen for Thai plants): lamina oblong, gradually narrowing upwards to acute apex, narrowly round at base .

Distribution in Thailand

PENINSULAR: Nakhon Si Thammarat.

Wider Distribution

S India, Sri Lanka, Vietnam, Taiwan and Malesia to New Guinea.

Ecology

Only once collected at high elevation on Khao Luang.

Proposed IUCN Conservation Assessment

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