The World Flora Online

Rhizome dark brown, erect, short, densely scaly; scales dark brown at center, brown near margin, narrowly linear, ca. 1 cm, entire. Stipe 10-60 cm, 3-10 mm in diam., base dark brown and covered with scales as rhizome; lamina imparipinnate, monomorphic, ovate-lanceolate, 55-100 × 20-60 cm, subleathery; pinnae numerous, close, alternate; lower ones contracted to small rounded auricles, 0.3-1 cm; upper ones oblique, distant, linear or linear-lanceolate, 10-30 × 0.8-1.8 cm, base sessile, rounded or subtruncate, or adnate, decurrent to rachis on basiscopic side, gradually narrowed to acuminate apex, terminal pinna similar to middle pinnae; veins free, parallel, simple or forked near costa, close. 2n = 66.

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Rhizome thick, ascending or suberect, densely covered with scales; scales linear, gradually narrowing towards apex, 2 cm or more long, up to 2 mm broad, tailed at apex, dark brown with pale cartilaginous edges which sometimes becoming uneven. Stipe stout, stramineous, or sometimes purplish when young, up to 60 cm long, densely scaly at base, bearing small auricles (reduced pinnae) throughout. Lateral pinnae many in number, close, 2–3 cm apart from each other, ascending, linear, gradually narrowing towards long-tailed apex, round or subtruncate at sessile base, or decurrent at posterior base and adnate in the upper ones, entire, 30 by 1.2–2 cm; veins simple or forked usually near costa, distinct on both surfaces, very close, up to 0.5 mm apart; coriaceous, green, glabrous throughout. Sori narrow, long-continuous along costa; indusia narrow, usually broken before maturity.

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On rather dry open slopes or in light shade at low or medium altitudes throughout Thailand.

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Tropics of Asia, Australia and the Pacific, India to Polynesia, north to southern edge of Japan (Yakushima).

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