Rhizome 4-5 mm thick, internodes to 1.5-3.5 cm long. Vascular strands with bundle sheath fully sclerified, to 2 cells thick; sclerenchyma strands very many; sclerified sheath present. Rhizome scales peltate, appressed to spreading, 7-9.5 by 1.8-3 mm, acute (apex often wrinkled), whitish to brown, evenly coloured or with a lighter margin, rarely with irregular dark spots, entire, with a very irregular flabelloid margin. Fronds simple, strongly dimorphic. Fertile fronds with stipe indistinct, 2-8 cm long; lamina 12-22.5 by 0.2-0.4 cm (to 1.3 cm wide in intermediate fronds), linear. Sterile fronds with stipe 0.5-5 cm long; lamina 5-14.5 by 1.5-3.5 cm, index 2.9-7.2, widest at 0.2-0.4 from base. Venation: main veins on upper surface not raised or raised, distinct. Hydathodes absent. Margin cartilaginous or concolorous, flat to thickened; notches sporadically to (mostly) regularly present, in fertile fronds sometimes absent. Sori longitudinally elongate or forming short transverse coenosori (in transitional fronds), in one row between adjacent veins, in one row between costa and margin, 3-4 mm wide, superficial.
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