Rhizome 0.5-1 mm thick, internodes to 0.7-2 cm long; vascular strands with bundle sheath hyaline; sclerenchyma strands absent. Rhizome scales peltate, spreading, 2.5-4.5 by 0.5 mm, acute, straw-coloured or brown, thin, translucent, evenly coloured, entire or remotely and weakly dentate, usually more strongly lacerate-dentate at the base. Fronds monomorphic. Stipe 0.4-10 cm long, usually very thin. Lamina 1-8 by 1-2.5(-3.6) cm, index 0.7-3.5, widest at 0.2-0.6 from base. Base rounded to cordate, occasionally cuneate, apex rounded to acuminate. Venation: costa only distinct; veinlets free or anastomosing, free veinlets excurrent and recurrent. Hydathodes frequent, calcareous scales not persistent. Margin cartilaginous, thickened; notches regularly present. Sori round, elongate, confluent within one areole or across connecting veins, in one or two rows between adjacent veins, in 1-4 rows between costa and margin, 1-2 mm wide, slightly sunken to deeply sunken.
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