Rhizome short-creeping to erect. Sterile and fertile fronds similar, 23-50 (-200) cm long, 6-15 (-28) cm wide. Stipe 6-83 cm long, stramineous to brown, darker at base; scales lanceolate, acuminate, entire, reddish brown to bicolorous. Lamina ovate to lanceolate, pinnate, with 17-52 pairs of pinnae; rachis and costae stramineous to brown; rachis glabrous; costal scales small, triangular, entire, reddish brown; sterile pinnae oblong-lanceolate, acuminate, 4-16.5 cm long, 5-16 mm wide, sessile, closely spaced; margins serrate; basal pinnae similar or slightly shorter; fertile pinnae similar to sterile. Spores 34 × 25 µm; perine granulose; exine smooth.
A species of wet places, forming dense stands often exposed to full sunlight, in swampy ground, areas which periodically flood, river banks, and margins of lakes, usually not far from the coast and occasionally in slightly brackish water.
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