Rhizome unknown. Petioles dark brown, shining, abaxially rounded or upward obtusely bi-angular. Lamina c. 35-40 cm long, oblong, bipinnate, with 4-5 pinnae to a side and a conform terminal one; primary rachis dark brown, abaxially rounded or narrowed-rounded. Pinnae linear, 15-30 cm by 12-15 mm, acute, with c. 55-95 pinnules to a side; secondary rachises brown at base, otherwise stramineous, abaxially carinate almost to base. Pinnules herbaceous, subcontiguous, asymmetrically ligulate, narrowed-rounded, at apex, the larger ones about 7 by 2 to 2.5 mm, the upper ones gradually and +-strongly reduced, a few confluent with the small lanceolate terminal segment. Upper margin of larger pinnules with 2 or 3 very oblique, acute incisions reaching down to 1/5; lobes rounded. Veins immersed, not evident, free, simple or once forked. Sori only in the outer part of the upper margin (in fully fertile pinnules possibly more extensive), bi-or rarely uninerval; indusium brownish, c. 0.3 mm wide, not quite reaching the margin. Spores pale brown, trilete, smooth, c. 20 μ.
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