Plants 20-40 cm tall. Rhizome erect, short, apex scaly; scales dark brown to black, narrowly triangular, with narrow pale brown edges, entire or denticulate. Fronds caespitose; stipe green, 8-18 cm, sulcate adaxially, sparsely covered with small dark brown fimbriate scales when young, later subglabrous; lamina linear-ovate, 10-25 × 3-4.5 cm, bipinnate, apex caudate; pinnae 20-24 pairs, basal pinnae opposite or subopposite, upper alternate, subsessile, lower pinnae usually not reduced, middle pinnae narrowly elliptic to oblong, 1-3 × 0.8-1.5 cm, base nearly symmetrical, cuneate-truncate, pinnate, apex obtuse; pinnules alternate, anadromous, 2-5 pairs, linear, 4-10 × 1-1.5 mm, base adnate to costa, entire, apex obtuse; first acroscopic pinnule 2-or 3-fid. Veins and costa raised adaxially, 1 vein per pinnule or segment, with terminal hydathode, not reaching margin. Fronds subfleshy but thin when dried, green to yellow-green when dry; rachis green, usually prolonged into flagelliform and gemmiferous apex, flat or shallowly sulcate with raised supravascular ridge on adaxial side, abaxially flat. Sori 1 per pinnule or segment, median on acroscopic side of subtending vein, linear, 2.5-5 mm; indusia grayish green, linear, membranous, entire, opening toward costa and margin, persistent.
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