Pteris nepalensis H.Ito

Family

Pteridaceae, subfamily Pteridoideae

Nomenclature

Pteris nepalensis H.Ito in Hara, Fl. E Himalaya: 466, pl. 25. 1966; Tagawa & K.Iwats., Fl. Thailand 3: 250, f. 20.1. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 130. 2000.

Description

Rhizome short, erect, bearing a few fronds in a tuft, scaly at apex; scales narrow, brown central portion and pale brownish, ferrugineous margin, about 3 by 1 mm. Stipes about 30 cm long, castaneous or paler, scaly at base. Laminae usually about 30 cm long and wide; lateral pinnae 2–5(–6) in number, broadest at middle portion, slightly narrowing towards base, gradually narrowing towards caudate apex, rather remote on more or less castaneous rachis, the lowest ones the longest, shortly stalked, bearing one or two large pinnatifid basal pinnules, upper pinnae becoming smaller, sessile; segments about 20 pairs, rounded to moderately acute at apex, falcate, up to 2 by 0.5 cm; softly papyraceous, dully green; veins forked, distinct on both surfaces. Sori continuous along margin of segments throughout.

Distribution in Thailand

NORTHERN: Chiang Mai.

Wider Distribution

E Himalaya.

Ecology

Terrestrial on humus-rich ground in light shade near the top of mountain, about 2500 m alt.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is fairly widespread and not under any known threat but further research is necessary.

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