Rhizome 3.5-4 mm thick, internodes variable (see note). Vascular strands with bundle sheath sclerified, 2 cells thick; sclerenchyma strands absent to many; sclerified sheath present. Rhizome scales peltate, appressed to spreading, 5.5-6.5 by 1-1.7 mm, acute, brown to blackish at base, upwards lighter, with irregular dark spots, entire or sometimes irregularly, coarsely dentate. Fronds simple, strongly dimorphic. Fertile fronds with stipe 1-5 cm long, or virtually absent. Lamina 4.5-12 by 0.1-0.3 cm or longer, linear. Sterile fronds with stipe 0.5-1 cm long, usually indistinct, often virtually absent. Lamina 5.5-14 by 0.6-1.3 cm, index 6.7-18, widest at 0.5-0.8 from base. Venation: main veins on upper surface not raised to raised, distinct. Hydathodes absent. Margin not differentiated to thickened, hardly cartilaginous; notches regularly present, in fertile fronds absent to sporadically present. Sori in a longitudinal coenosorus, singly between costa and margin, 2 mm wide, superficial.
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