Plants (10-)20-45 cm tall. Rhizome erect, short, apex scaly; scales dark brown, triangular, margin dentate-fimbriate or entire. Fronds caespitose; stipe semiterete, 7-21 cm, abaxially green or castaneous up to middle, with scales or subglabrous, adaxially shallowly sulcate with supravascular ridge; lamina triangular to ovate, 12-30 × 6-13 cm, apex acute, 2-or 3-pinnate or up to 4-pinnatifid; pinnae 10-16 pairs, alternate, stalk short, basal pair almost not reduced, narrowly triangular, 3-8 × 1.6-3 cm, base truncate to cuneate, up to tripinnatifid, apex acute-acuminate; pinnules (4-)6-12(-16) pairs, alternate, anadromous, shortly stalked, usually acroscopic segment larger, ovate, 1.3-2.8 × 1-1.3 cm, up to 2-pinnatifid; secondary pinnules 3 or 4 pairs, 5-8 × 4-6 mm, base cuneate and decurrent on costule, 2-4-partite, apex obtuse; ultimate segments ovate-lanceolate, ca. 1.5 mm wide, with a single vein, apex acute. Costa slender, adaxially sulcate with supravascular ridge to almost flat when dry, terminal hydathode obvious, not reaching margin. Fronds thinly herbaceous, green; rachis green, adaxially shallowly sulcate with median supravascular ridge or flat, adaxial side of costae or costules with small gemma or plantlet. Sori 1 per ultimate segment, median on subtending vein, elliptic, 1.5-2 mm; indusia whitish to grayish green, linear to elliptic, membranous, entire, opening toward margin costule or central veinlet, persistent. Spores with lophate (alate) perispore. Plants sexual, diploid or tetraploid: 2n = 144.
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