Rhizome c. 1 mm thick, long-creeping, phyllopods 1-1.5 cm apart, buds about halfway along the internodes. Anatomy: vascular strands 5, sclerenchyma sheath distinct, sclerenchyma strand 1, central. Rhizome scales spreading, peltate, up to 2.5 by 0.4 mm, base ciliate, acumen narrowing to a filiform, entire apex, central region brown. Fronds strongly dimorphic, stalked. Fertile fronds with stalks 1-1.5 cm long, lamina 2-8.5 by 0.2-0.4 cm, index 7-25, linear. Sterile fronds with stalks up to 0.4 cm, lamina 1-4 by 0.5-1.5 cm, index 1-5, widest at the middle. Venation: veins not distinct in the mesh of anastomosing veinlets, free veinlets simple or forked, excurrent. Hydathodes absent. Stellate hairs monomorphic, appressed, forming a sparse mat, hyaline, the rays short. Coenosorus apical or extending to the base of the lamina, sunken, with sporangia in two rows separated by a row of paraphyses, maturing from inside outwards. Sporangia long-stalked, paraphyses with straight rays. Spores variously tuberculate.
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