Plants 60-75 cm tall. Rhizome ascending, apex densely clothed with dark brown scales. Fronds clustered; stipe dark chestnut at base, upper part paler, shiny, ca. 30 cm × 2 mm, adaxially narrowly grooved; lamina 2-or 3-pinnatipartite, ovate in outline, ca. 45 × 25 cm; lateral pinnae 7-9 pairs, subopposite, decumbent, 14-18 × 3.5-4 cm, base slightly attenuate-cuneate, deeply pectinately divided to within ca. 3 mm of costa, apex acutely lanceolate caudate (3-5 cm); basal pinnae pair largest, each shortly stalked and with a basiscopic pinnule near base similar to main part of pinna but smaller; segments 15-18 pairs, alternate, oblique, narrowly lanceolate, 13-25 × ca. 4 mm, margin not densely serrate, interval equal to width of segment; apical pinnae same as middle lateral pinnae in shape and size, but cuneate and decurrent at base; costae prominent abaxially, below middle part maroon, upper 1/3 part straw-colored, straw-colored and slightly grooved adaxially; veins anastomosing to form a series of narrow areoles along costules, width of areole ca. 1/2 wing width to almost same size, occasionally incised, veinlet in segment 2-forked; lamina brown-green, herbaceous when dried, glabrous.
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