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Rhizomorph up to 1.5 mm below surface, 3-lobed, < 15 mm in diam., lycophyll primordia absent. Lycophylls up to 70 in number, up to 400 x 3 mm, terete to somewhat flattened, base broadly deltate, winged at base only; ligule elongate. Velum absent. Sporangium oblong-ovate, up to 4 x 2.5 mm. Megaspores trilete, white, tubercular, reticulate on all surfaces, 400-640 gm in diam. Microspores monolete, minutely tuberculate, up to 24 x 35 gm.
Corm 3-lobed; leaves 5-70 in number, somewhat flattened, 9-45 cm long, 2-3 mm broad, hardly narrowed to the rounded point, flaccid; stomata present on upper part of lamina, peripheral strands absent; ligule very delicate in texture, somewhat elongated; sporangia 2.5-10 mm long, 2-5 mm wide, lacking a velum; megaspores white, 400-640 µ diam., reticulated on all faces; microspores 24-35 µ long, 20-24 µ broad, minutely tuberculate.
