Rhizome scales basifixed, 8-15 by 4-9 mm, index 1.5-2, widest near the middle, margin with flabelloid zone up to 3.5 mm wide and short hairs, apex rounded, midrib present. Fronds: base fronds conspicuously stalked, green, appressed when old, 20-50 by 20-40 cm, margin entire, veins prominent. Foliage fronds maturing subsequently, asymmetrical, erect, 25-50 cm long or longer, with two unequal main lobes, one sterile, forked 4-6 times, one fertile, forked 4-7 times, with a central horizontal, stalked fertile patch. Hairs with 6-11 rays up to 1 mm long. Soral patch stalked 2-10 cm, obovate to elliptical, rarely bilobed or forked, 5-17 by 3-15 cm, sporangia with 10 or 11 indurated annulus cells, interspersed with receptacular paraphyses with 11-15 short-clavate rays. Spores 8 per sporangium.
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