Rhizome long-scandent, 1-2 mm ø, ± per-manently scaly; scales honey-coloured, triangular, to 2 mm long, up to c. 20-seriate, the apex scarcely uniseriate. Leaves 1.5-4 cm apart; petioles stramineous to medium brown, ± lustrous, abaxially terete, adaxially narrowly sulcate, in simply pinnate leaves almost wanting, in bipinnate ones 10-15 cm long, shorter than the lamina. Lamina simply pinnate or bipinnate; if bipinnate oblong, c. 30 cm long, with c. 6 pinnae to a side and a conform terminal one; rachis like the petiole. Pinnae not strongly ascending, sessile, their width apart or slightly closer, linear, 10-15 cm long, 2-2.5 cm wide, shortly acuminate; upper pinnae somewhat shortened. Secondary rachises slender, stramineous, abaxially ± distinct-ly bi-angular and sulcate. Pinnules thinly herbaceous, dark olivaceous when dry, spreading, close but scarcely contiguous, c. 25 to a side; larger pinnules arcuate-ligulate in outline, 10 to 12 by 4 to 5 mm, c. 2.5 times as long as wide, the lower margin concave, the upper margin deeply incised; primary segments 4-6, the basal ones twice, the upper ones mostly once forked; ultimate lobes linear, divergent, 0.3-0.4 mm wide, almost parallel-sided to the spathulate soriferous apex, subacute if sterile, usually all lobes fertile, the fertile segments suddenly broadened at the sorus, there 1/2-3/4 mm wide, the apex rounded or narrowed-rounded, subentire to erose; wings connecting the lobes about as wide as the lobes. Upper pinnules gradually and strongly reduced, confluent into the pinnatisect pinna-apex. Veins immersed, evident, Single in the lobes. Simply pinnate leaves like the pinnae of bipinnate ones. Sori uninerval; indusium pale, delicate, subentire to erose, 1/4-3/4 mm long, 1/4 mm wide, if long sometimes with concave base, otherwise semi-elliptic, with free sides, not reaching the margin by its own width to almost reaching it, somewhat reflexed at maturity. Spores pale brownish, trilete, smooth, 22-25 μ.
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