Stems erect. Leaves monomorphic, arching, 2--10 dm; bulblets absent. Petiole 1/5--1/3 length of leaf, densely scaly; scales light brown, gradually diminishing in size distally. Blade broadly lanceolate, 2-pinnate, base not narrowed. Pinnae narrowly lanceolate, not overlapping, in 1 plane, 3--13 cm; base oblique, apex acute with subapical and apical teeth same size; microscales filiform, lacking projections, sparse abaxially, but longer than in other Polystichum species, forming loosely tangled network over blade and sori (such network only in this species), sparse adaxially. Pinnules ± stalked, linear-falcate to oblique-rhombic, acroscopic auricle well developed on proximal pinnules; margins spinulose-dentate; apex acute. Indusia ciliate. Spores brown. 2 n = 82.
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