Rhizome 2-4 mm thick, phyllopods contiguous or internodes to 0.5 cm long; vascular strands with bundle sheath hyaline; sclerenchyma strands very many. Rhizome scales peltate, spreading, 5-8.5 by 1-1.4 mm, acute or contracted into a narrower acumen, straw-coloured to dull brown, at base consisting of thick spongy costa with a fragile, thin, narrow, translucent margin, remotely and weakly dentate at base, entire towards the apex. Fronds simple, dimorphic to strongly dimorphic. Fertile fronds with stipe 2-20 cm long; lamina 12-52 by 0.6-4 cm, index 6.9-32, widest at 0.4-0.6 from base or linear. Sterile fronds with stipe 0.5-14(-28) cm long. Lamina 23-37 by 0.8-6.3(-8.5) cm, index 2.9-11, widest at 0.3-0.8 from base; base and apex acuminate. Venation: main veins distinct, on upper surface not raised or raised. Hydathodes frequent, calcareous scales not persistent. Margin cartilaginous, slightly thickened; without notches. Sori forming transverse coenosori (slightly elongate or round in narrow fronds) across connecting veins, single between adjacent main veins, 2-4 mm wide, slightly to (usually) deeply sunken.
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