Rhizome 2-4 mm thick, internodes to 1 cm long or slightly longer. Vascular strands with bundle sheath hyaline or partially sclerified; sclerenchyma strands very many. Rhizome scales peltate, spreading, 2.5-5 by 0.5-1 mm wide, acute, brown, evenly coloured or with a slightly lighter margin, short-dentate to strongly dentate. Fronds simple, monomorphic. Stipe 2-25 cm long; lamina 4-30 by 1.2-8 cm or longer, index 3.7-10, widest at 0.2-0.5 from base. Venation: main veins on upper surface raised, distinct; veinlets anastomosing, free veinlets excurrent and recurrent. Hydathodes mostly frequent, calcareous scales not persistent, or rarely persistent. Margin cartilaginous, thickened; notches absent or rarely sporadically present. Sori round or occasionally confluent within one areole, in 2, or occasionally in 3 or more irregular rows between adjacent veins, in 5 or more rows between costa and margin, 2(-3) mm wide, superficial.
Home