Athyrium setiferum C.Chr.
Athyrium setiferum C.Chr., Index Filic.: 146. 1905; Boonkerd & Pollawatn, Pterid. Thailand: 190. 2000. – Asplenium tenerum C.Hope, J. Bombay Nat. Hist. Soc. 12: 529, t. 4. 1899, non Roxb. 1816, nec Fée 1852; Tagawa & K.Iwats., Fl. Thailand 3: 448. 1988.
Terrestrial. Rhizome short, erect, bearing a few fronds at apex, scaly; scales narrow, with tailed apex, up to 8 by 1 mm, brown, entire. Stipes up to 35 cm long, stramineous, dark and scaly at broadened base. Laminae narrowly oblong, acuminate at apex, up to 30 by 15 cm, bipinnate-tripinnatifid; lower pinnae 3–5 cm apart, patent or slightly deflexed, narrowly oblong, acuminate at apex, auricled at acroscopic base, the upper pinnae smaller, ascending; pinnules oblong, oblique, round at apex, auricled or broadly cuneate at anterior and narrowly cuneate at posterior bases, subsessile or shortly stalked, about 1 by 0.5 cm, deeply lobed; lobes oblong, oblique, rounded to obtuse at apex, toothed; papyraceous, light green; veins pinnate, veinlets ending in teeth; a soft spine present at each junction between costa and costule and between veins and veinlets. Sori round to oblong, costular; indusia thin, all one-sided, crenate at margin .
Distribution in Thailand
NORTHERN: Chiang Mai.
Himalaya to Yunnan.
On humus-rich mountain slopes near streams in dense mossy forests at 2000–2500 m alt.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is widespread and not under any known threats.
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