Plants 20-40 cm tall. Rhizome erect, densely covered with lanceolate brown scales. Stipe stramineous, 5-15 cm, 1-3 mm in diam. at base, lower portion scaly; scales brown, blackish brown at center, ovate or lanceolate, margins fimbriate, gradually becoming glabrous upward. Lamina linear-lanceolate, 22-45 × 3-8 cm, base slightly contracted, imparipinnate or not, apex acuminate; rachis with sparse lanceolate or linear brown ciliate scales; stalk bases often scaly. Lateral pinnae 18-24 pairs, alternate, spreading, shortly stalked, broadly lanceolate; middle pinnae 1.5-4 × 0.8-1.5 cm, basiscopic base oblique, acroscopic base truncate and with acute auricles, pinna margins ± denticulate, apex with a gradually reduced lanceolate pinna; papery, abaxially with sparse lanceolate brown microscales or glabrous, glabrous adaxially; venation pinnate, indistinct on both surfaces, veinlets anastomosing to form 2 or 3 rows of areoles on each side of midrib, each areole with 1 or 2 included free veinlets. Sori throughout abaxial surface of pinnae; indusia margins with long teeth. 2n = 82*.
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