Caudex quite prostrate, c. 5 mm diameter; stipe to 50 cm long, glabrescent, dull reddish, basal scales to 5 mm long, narrow, not persistent; lamina of young plants simple, of mature plants trifoliate or with a deeply trilobed apex and one pair of unlobed pinnae; apical lamina or simple frond to 28 × 8 cm, margins entire, base narrowly cuneate, apex abruptly caudate-acuminate; pinnae to 20 × 5 cm, sessile, with a bud at the base of each on old fronds, unlobed, shape as apical lamina but sometimes wider on the basiscopic side of the costa than on the acroscopic side; costae sparsely short-hairy near their bases on lower surface only; main veins c. 10 mm apart along costae, upcurved, slender, cross-veins irregular with 3 or 4 series of areoles between them, smaller veins slender and distinctly prominent when dried; sori in a rather uneven row on each side of main veins, often with many additional ones between the rows, not on free veinlets; indusia firm, persistent, slightly reniform.
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