Elaphoglossum subellipticum Rosenst.

Family

Dryopteridaceae

Nomenclature

Elaphoglossum subellipticum Rosenst., Hedwigia 56: 348. 1915; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 89. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 306, f. 25.4–25.6. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 187. 2000.

Description

Rhizome short, densely scaly throughout; scales brown or light brown, shining, linear, up to 10 by 1 mm, with irregular teeth or projections at margin. Sterile frond of two sizes: larger ones a few on a plant; stipe about 10 cm long, stramineous or darker, densely scaly at base, sparsely so on the remainder with narrow dark scales; lamina elliptic, gradually narrowing towards both ends, acute at apex, the base decurrent to very narrow wings on the upper part of stipe, about 25 by 5.5–7 cm; midrib distinctly raised on lower surface, veins forked, distinct on both surfaces, the apex ending inside the narrow cartilaginous margin; coriaceous, pure green, very sparsely scaly on lower surface; smaller sterile frond many on a plant; stipe 3–6 cm long, winged on upper part; lamina oblong, acute at apex, round at base, 6–15 by 2.5–4 cm. Fertile frond: lower than the larger sterile fronds but higher than the smaller sterile ones; stipe about 10 cm long, winged at uppermost part; lamina broadest at middle, gradually narrowing towards both ends, up to 12 by 2.5 cm.

Distribution in Thailand

NORTH-EASTERN: Loei.

Wider Distribution

Taiwan and Sumatra.

Ecology

On mossy rocks or on tree trunks in dense evergreen forests at l000–l400 m alt.

Proposed IUCN Conservation Assessment

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

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