Family

Polypodiaceae

Nomenclature

Loxogramme duclouxii Christ, Bull. Acad. Int. Geogr. Bot. 16: 140. 1907; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 177. 1970; Tagawa & K.Iwats., Fl. Thailand 3: 578, f. 57.11. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 278. 2000.

Description

Rhizome long creeping, 1.5–3 mm diam., dark brown, densely covered with scales; scales thin but firm, fuscous-brown, ovate-oblong or narrower, subulate, entire, clathrate, up to 10 by 2 mm. Fronds remote, oblanceolate, broadest at middle to 1/4 way from apex, acuminate at apex, up to 45 by 4 cm, the edges often involute, very gradually attenuate towards base and decurrent into narrow wings of indistinct, short stipes with castaneous base; midrib raised on upper surface, a little distinct and flattened beneath, pale green; veins invisible, anastomosing to form elongate areoles usually with included veinlets; coriaceous, thick and fleshy, deep green on upper surface, paler beneath, glabrous. Sori confined to the upper half of the laminae, usually close together, and deeply overlapping with the next ones, oblique, up to 4 cm by about 2 mm, rather closer to costa than to the margin of laminae, superficial .

Distribution in Thailand

NORTHERN: Chiang Mai; NORTH-EASTERN: Phetchabun, Loei.

Wider Distribution

Tibet, NE India, SW China, Korea (Quelpart), S Japan to Taiwan.

Ecology

On mossy rocks in dense evergreen forests at 1400–1800 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. 5153, Loei, Phu Luang Wildlife Sanctuary (E).