Plants summer-green. Rhizome slender, creeping, dark brown, 1-1.5 mm in diam., with sparse pale brown ovate or ovate-lanceolate membranous scales; fronds distant or approximate. Lamina dimorphic, stipe of sterile frond short. Fertile fronds up to 50 cm; stipe dark brown at base, upward light green-stramineous or stramineous, 9-20 cm, 0.5-1 mm in diam. at base, base sparsely scaly, upward with sparse small deciduous lanceolate scales; lamina 1-pinnate, narrowly lanceolate or lanceolate, 15-25 × 4-7 cm, base wider or shorter than or as wide as middle, apex acuminate; pinnae 15-25 pairs, spreading or base slightly deflexed, oblong or shortly lanceolate, 2-4 × 0.5-1 cm, base asymmetrical, acroscopic base subauriculate, basiscopic base rounded-cuneate, sessile, pinnatilobate or pinnatipartite, apex rounded, acute, or shortly acuminate; pinna lobes 4-8 pairs, oblong to rectangular, entire, slightly ascending, apex truncate or rounded; veins pinnate with 2-4 pairs of simple veinlets, visible on both sides. Lamina thinly herbaceous, green or light brown when dry, dark on adaxial surface; rachis with sparse pale brown lanceolate scales and long nodose hairs, costa and veins adaxially with sparse short nodose hairs. Sori shortly linear, 1-3 pairs per pinna lobe, single or double on acroscopic veinlet; indusia brown, membranous, margin usually erose, sometimes lacerate, rarely incurved, usually not incurved when young. Spores elliptic in polar view, semicircular in equatorial view, perispore with prominently hyaline, verrucose and muriform protuberances. n = 120 (6´).
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