Oreogrammitis congener (Blume) Parris

Family

Polypodiaceae

Nomenclature

Oreogrammitis congener (Blume) Parris, Gard. Bull. Singapore 58: 257. 2007; Parris, Fl. Pen. Malaysia, Ser. I, Ferns & Lycoph. 1: 161. 2010. – Grammatis congener Blume, Enum. Pl. Jav.: 115. 1828. – Type: Blume s.n., Java (lectotype L).

Grammitis setosa auct. non Blume: Tagawa & K.Iwats., Fl. Thailand 3: 585. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 292. 2000.

Description

Rhizome short creeping, bearing closely spaced fronds, densely scaly; scales gradually narrowing towards long-tailed apex, up to 4 by 1 mm, pale brown, thin, entire. Stipes 0.8–3.5 cm long, dark, densely hairy with patent setose hairs up to 1 mm in length. Laminae linear-lanceolate or narrowly elliptic, gradually narrowing towards both apex and base, subentire or wavy at margin, up to 20(–21) by 0.5–1.1 cm; veins usually twice forked or seemingly pinnate in larger fronds, hardly visible, ending in hydathodes on upper surface, papyraceous or thicker, hairy throughout, the hairs castaneous to darker, up to 2 mm in length. Sori dorsal at acroscopic branches of the first fork, costular, round, rarely fusing to those adjacent .

Distribution in Thailand

SOUTH-EASTERN: Chanthaburi; PENINSULAR: Nakhon Si Thammarat.

Wider Distribution

Thailand, Indo-China, Taiwan, Sumatra, Peninsular Malaysia, Borneo, Java, Lesser Sunda Islands, Philippines, Sulawesi, Moluccas.

Ecology

On mossy tree trunks in dense evergreen forests on ridge of mountains at high altitudes where the daily mist previals.

Proposed IUCN Conservation Assessment

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

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