Asplenium grevillei Wall. ex Hook. & Grev.
Asplenium grevillei Wall. ex Hook. & Grev., Icon. Filic.: t. 228. 1831; Christ, Bot. Tidsskr. 24: 108. 1901; C.Chr., Bot Tidsskr. 32: 346. 1916; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 217. 1940; Holtt., Dansk Bot. Ark. 20: 28. 1961; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 84. 1967; Holttum, Gard. Bull. Singapore 27: 153. 1974; Tagawa & K.Iwats., Fl. Thailand 3: 269. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 141. 2000; Newman et al., Checkl. Vasc. Pl. Lao PDR: 25. 2007. – Neottopteris grevillei (Wall. ex Hook. & Grev.) J.Sm., J. Bot. 4: 176. 1841. – Thamnopteris grevillei (Wall. ex Hook. & Grev.) T.Moore, Index Filic.: L. 1857; Bedd, Handb. Ferns Brit. India: 139, f. 70. 1883.
Terrestrial. Rhizome short, erect, bearing several fronds in a tuft, covered with scales; scales brown, up to 4.5 by 2.5 mm, indistinctly clathrate, bearing hair-like projections at margin. Stipes dark brown to nearly black, very narrowly winged almost to the base, bearing small scales when young. Frond spathulate, broadest at middle to upper 2/3, narrowing towards caudately acuminate apex, gradually narrowing towards attenuate base and then decurrent on stipe as wing, up to 40 cm long including stipe, up to 4.5 cm broad, the edges subentire or slightly undulate, papyraceous or thicker, green, paler below, minutely scaly when young, glabrescent; midrib green to darker, a little raised below, veins hardly visible on both surfaces, unusually once forked near midrib, joining at apex forming submarginal vein about 0.5 mm inside margin. Sori elongate along veins, extending from near midrib to about 5 mm from margin on the whole under surface; indusia about 0.7 mm broad.
Distribution in Thailand
NORTHERN: Chiang Mai, Chiang Rai, Phitsanulok; NORTH-EASTERN: Khon Kaen; SOUTH-WESTERN: Kanchanaburi, Phetchaburi; SOUTH-EASTERN: Trat; PENINSULAR: Chumphon, Surat Thani, Nakhon Si Thammarat, Trang, Pattani.
Distribution in Laos
Burma (Tenasserim), Laos and Vietnam.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is widespread and not under any known threats.
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