Rhizome 1.3-3 mm thick, long-creeping, phyllopods 2-9 cm apart, buds halfway along the internodes. Anatomy: vascular strands 6-8, sclerenchyma sheath distinct, sclerenchyma strands absent. Rhizome scales spreading, peltate, 3.1-7.5 by 0.4-0.7 mm, base entire to dentate, acumen ciliate, light brown. Fronds dimorphic, stalked. Fertile fronds with stalks to 2-18 cm long, 0.2-1 t as long as the lamina, lamina 5.5-22 by 1.5-5.5 cm, index 3-10, base cuneate, widest at or below the middle, apex obtuse to acuminate. Sterile fronds with stalks 1-11 cm, 0.1-0.5 as long as the lamina, lamina to 9 cm wide, index 2-3, otherwise similar. Venation: veins distinct, veinlets simple or forked, frequently anastomosing, free veinlets excurrent and recurrent. Hydathodes distinct. Stellate hairs dimorphic, appressed, forming a very thin inconspicuous mat, often fugaceous, hyaline, the straight rays short, boat-shaped. Sori very closely packed, superficial, developing more or less simultaneously, soral area appearing acrostichoid when old. Sporangia stalked, paraphyses not differentiated. Spores coarsely and irregularly tuberculate.
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