Rhizome 3-4 mm thick, internodes to 1-2.5 cm long; vascular strands with bundle sheath fully sclerified, to 2 cells thick; sclerenchyma strands many to very many. Rhizome scales peltate, spreading to squarrose, 4-6.5 by 1-1.5, acute, brown to blackish, evenly coloured, with a lighter margin, or with irregular dark spots, short-dentate. Fronds simple, strongly dimorphic. Fertile fronds with stipe 0.5-4 cm long; lamina 4-10(-19) by 0.5-1.2 cm, index 7.5-12.5, widest at 2-5.5 from base, or linear. Sterile fronds with stipe 1-7.5 cm long; lamina 6-17.5 by 1.3-3 cm, index 3.3-7.3, widest at 0.3-0.5 from base. Costa only distinct or main veins distinct also. Venation: main veins on upper surface not raised or raised. Hydathodes absent. Margin not differentiated to cartilaginous, thickened; without notches. Sori round to elongate, single between adjacent veins, in one row between costa and margin, 4-5 mm wide (receptacle usually covering most of the areole), superficial.
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