Rhizome 1-6 mm thick, internodes 0.5-6 cm long, vascular strands with light to dark brown sclerenchymatous sheaths, sclerenchyma strands 12 to many. Rhizome scales 2.4-3.9 mm. Stipe to 22 cm long; lamina to 59 by 8(-10) cm, 1.5-4 as long as the stipe, pinnae to 7 mm wide, increasingly crenate towards the apex or sometimes crenate throughout, obtuse or acute to rounded. Veins free, simple or once forked. Sori deeply sunken, forming narrow, to 2 mm high papillae on the adaxial surface, 0.5-1 mm diam. Sporangia on stalks 0.8-1.7 mm long, protruding when mature. Spores 54-64 µm, smooth.
Home