Rhizome 4-6.5 mm thick, internodes to 1.5-4 cm long; vascular strands 11-14, with bundle sheath partially sclerified; sclerenchyma strands very many. Rhizome scales peltate, appressed or spreading, 3.8-4 by 1.2-1.8 mm, obtuse to acute (often apiculate), whitish to brown, with a lighter margin, entire to short-dentate, also irregularly lacerate. Fronds simple to pinnate, strongly dimorphic. Fertile fronds: stipe 14-50 cm long, lamina simple, pinnatifid or fully pinnate, rarely bipinnatifid, 13-27 cm long. Simple fronds 1-1.3 cm wide, widest at 3-12 cm from base. Pinnatifid/pinnate fronds with 3-7 pairs of pinnae, width of connecting strip 0.1 cm (or less); largest fertile pinna is 1, blade 11-18 by 0.7-1.3 cm, with a cusp 0-2 cm long. Sterile fronds: stipe 7-40 cm long; lamina simple, trilobed or pinnatifid, 6-33 cm long. Simple fronds (or end lobes of trilobed fronds) 4.1-8.8 cm wide, widest at 2 cm from base. Pinnae 1-4(-7) pairs, width of connecting strip 0.4-2 cm; largest sterile pinna: blade 4.5-15(-21) by 2.3-5.5 cm, widest at 0.2-0.5 from base, acute or cuspidate with a cusp to 2 cm long. Venation: main veins on upper surface not raised, distinct, veinlets rarely also distinct; veinlets free and anastomosing, free veinlets excurrent and recurrent. Hydathodes absent or present. Margin cartilaginous, thickened; notches sporadically or regularly present, in fertile fronds sometimes absent. Sori round, single between adjacent veins, in one row between costa and margin, at 1.5-3 mm from costa, 4 mm wide, deeply sunken.
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