Davallia angustata Wall. ex Hook. & Grev.

Family

Davalliaceae

Nomenclature

Davallia angustata Wall. ex Hook. & Grev., Icon. Filic.: t. 231. 1831; Nooteboom, Fl. Males., Ser. II, Ferns and Fern Allies 3: 247. 1998. – Humata angustata (Wall. ex Hook. & Grev.) J.Sm., J. Bot. 3: 416. 1841; Bedd., Handb. Ferns Brit. India: 47. 1883; Holttum, Rev. Fl. Malaya ed. 1, 2: 367, f. 212. 1955 [‘1954’]; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 54. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 167. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 235. 2000. – Pachypleuria angustata (Wall. ex Hook. & Grev.) C.Presl, Epimel. Bot.: 98. 1851 [‘1849’]; Tagawa & K.Iwats., Fl. Thailand 3: 617. 1989. – Type: Wallich 242 (K holo; BR, P), Roxburgh, Prince of Wales Island.

Description

Rhizome long creeping, about 2 mm diam., glaucous, densely scaly throughout; scales gradually narrowing from oblong base towards tailed apex, about 5 by 1 mm, brown to darker. Stipes up to 3 cm long, winged on upper part, stramineous to pale green. Laminae simple, linear, gradually narrowing towards acute apex, round at base, entire, up to 15 by 1.5 cm; coriaceous, hairy on midrib underneath; veins once or twice forked near midrib, all free. Sori terminal, on veinlets, in one marginal row at each side of lamina; indusia round , up to 1 mm broad.

Distribution in Thailand

PENINSULAR: Songkhla, Yala.

Wider Distribution

W Malesia.

Ecology

On mossy tree trunks in dense forests.

Proposed IUCN Conservation Assessment

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

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