Rhizome rather long-creeping, 1-1.5 mm ø, rather thinly and deciduously scaly; scales yellow, ovate-triangular, to c. 1 mm long, to 6-seriate at base, a short apical portion uniseriate. Leaves to 0.5 cm apart; petioles stramineous to fawn-coloured, 10-40 cm long, mostly longer than the lamina, abaxially terete below, upward gradually obtusely or acutely bi-angular and flattened. Lamina herbaceous or chartaceous, 10-30 cm long, 4-17 cm wide, 2-3 times as long as wide, triangular or oblong, bipinnate or bipinnate + pinnatilobate or bipinnate + pinnatifid, rarely tripinnate at base; leaf apex gradually of simpler structure. Primary rachis abaxially flattened, bi-angular. Pinnae spreading or slightly ascending, the major ones c. 4-10 to a side, most or all subopposite, the largest, basal ones 2½-10 cm long and 12-18 mm wide, not narrowed at the base, rather evenly narrowed in the upper half or throughout; secondary rachises abaxially flattened, bi-angular, green-margined to the base or almost so. Basal pinnules on both sides of lower pinnae of large leaves usually pinnatilobate to pinnatifid, rarely fully pinnate, then with few pinnules. Ultimate pinnules variable in size and shape, largely depending on the degree of dissection of and their place in the lamina, but distinctly dimidiate-subflabellate; larger ones trapezoidal, subquadratic, subsessile, the larger, not dissected ones up to 5 by 3.5 to 10 by 6 mm, if dissected the smaller ones with incisions only on the acroscopic side, the larger ones on both sides. Upper pinnules reduced, not strongly so in pau-cijugate pinnae, the terminal segment then obliquely rhombic, obtuse, free or almost so, to 5 mm long, more strongly reduced in plurijugate pinnae, the upper pinnules denticuliform, confluent into a narrow, pinnatifid pinna-apex. Margin of sterile pinnules sharply dentate, of fertile ones obscurely or mostly distinctly erose. Veins immersed, usually not evident, 1-3 times forked, c. 0.5 mm apart, free, connivent, or spo-radically and irregularly anastomosing; leaves of adult plants hardly ever without any anastomoses, but often many pinnules, especially smaller ones, quite free-veined. Sori continuous except as interrupted by incisions of the margin; indusium pale, erose to gashed, almost reaching to slightly exceeding the margin, 0.3-0.5 mm wide, not reflexed at maturity. Spores medium brown, trilete, smooth, c. 25 μ.
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Rhizome short-creeping, 1–1.5 mm diam.; scales to c. 1 mm long, yellowish. Fronds monomorphic. Stipes closely spaced or clustered, 10–40 cm long, stramineous to pale brown. Lamina 2-pinnate, narrowly ovate, oblong or triangular, 10–30 cm long, 4–17 cm wide. Pinnae widely spreading to ascending, ±opposite; upper pinnae gradually reduced, with a ±pinnatifid apex; secondary basal pinnae lobed, pinnatifid or pinnate. Pinnules subsessile, dissected or not, to 4–10 mm long and 3.5–6 mm wide, flabellate to diamond-shaped with the latter attached by the lower inside corner; large dissected pinnules incised on both sides; smaller pinnules dissected on upper side only; fertile pinnules with irregular margins. Veins free or irregularly anastomosing, forked 1–3 times. Sori continuous, except at marginal incisions; indusium 0.3–0.5 mm wide, pale, extending to or beyond margin, uneven to deeply incised. Spores trilete, brown, smooth.
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