Asplenium perakense C.G.Matthew & Christ

Family

Aspleniaceae

Nomenclature

Asplenium perakense C.G.Matthew & Christ, J. Soc. Bot. 39: 214. 1909; Holttum, Rev. Fl. Malaya ed. 1, 2: 429, f. 248. 1955 [‘1954’]; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 88. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 286. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 144. 2000.

Description

Epiphytic or lithophytic. Rhizome short, suberect, bearing a tuft of fronds, densely scaly; scales gradually narrowing from base towards hair-pointed apex, entire, or with a few long projections near base, up to 10 by 1 mm at base, brown. Stipes polished black to dark brownish-purple, scaly throughout, 10–25 cm long. Laminae narrowly oblong, acute at apex, a little reduced downwards, up to 40 by 16 cm; rachis like the upper part of stipe, scaly with narrow scales; pinnae 15–20 pairs, stalked, middle ones the largest, ascending, narrowly subtriangular, caudately acuminate at apex, auricled at acroscopic and cuneate at basiscopic bases, lobed nearly to costa, up to 8 by 2.5 cm; lobes oblong or quadrangular, oblique, dentate at apex, usually 5–7 mm wide; softly chartaceous to chartaceous, veins visible. Sori long, crescent-shaped, 1–4 for each lobe; indusia herbaceous .

Distribution in Thailand

SOUTH-WESTERN: Prachuap Khiri Khan; PENINSULAR: Nakhon Si Thammarat.

Wider Distribution

Peninsular Malaysia.

Ecology

On mossy tree-trunks or on moist rocks in lower montane forests at 1000–1700 m alt.

Proposed IUCN Conservation Assessment

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

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