Antrophyum obovatum Baker

Family

Pteridaceae, subfamily Vittarioideae

Nomenclature

Antrophyum obovatum Baker, Bull. Misc. Inform. Kew 1898: 233. 1898; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 202. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 111. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 220. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 133. 2000.

Description

Epiphytic. Rhizome short creeping, bearing several fronds in a tuft, densely scaly; scales linear, gradually narrowing from base towards tailed apex, up to 7 by 1 mm, dark brown, densely toothed at margin. Stipes up to 8 cm long, dark green to dark brown, scaly in lower part. Frond obovate, broadest at about 1/5 part from apex, acuminate to cuspidate at apex, gradually narrowing downwards to narrowly cuneate base, up to 15 by 6 cm, entire but cartilaginous at margin, coriaceous to leathery, green, glabrous; costa indistinct, veins copiously anastomosing. Sori linear, in shallow furrows, usually anastomosing along veins; paraphyses short, club-shaped.

Distribution in Thailand

NORTHERN: Chiang Mai.

Wider Distribution

N India, China, Indochina, Taiwan, and as far north as Japan.

Ecology

On mossy tree trunks in lower montane forests at about 1500 m alt.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is common and widespread although not commonly collected in Thailand.

Voucher specimens - Thailand

Middleton et al. 5036, Chiang Mai, Doi Ang Khang (E).

Whole plant from above

Whole plant from above

Whole plant from below

Whole plant from below

Rhizome

Rhizome

Older and younger sori

Older and younger sori

Upper surface of frond

Upper surface of frond

Frond apex

Frond apex

Very young sori in grooves

Very young sori in grooves

Young sori

Young sori

Sori

Sori

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