Plants 10-20 cm tall. Rhizomes erect, slender, bearing a cluster of unbranched fleshy roots; roots stolonlike, producing new plants at apices. Fronds simple or 2 or 3 together. Common stalk green or pale when lower part buried underground, 3-6 cm, slender. Sterile lamina simple, sessile, light green, oblanceolate or oblong-oblanceolate, 2-5 cm × 3-10 mm, herbaceous, base narrowly cuneate, margin entire, apex slightly acute or obtuse; veins reticulate, indistinct, but visible under light. Sporophore arising from base of sterile lamina; stalk 5-7 cm, overtopping sterile lamina; spike narrowly linear, 2-3 cm, acute at apex, with 15-28 pairs of sporangia. Spores pale, surface subreticulate or subsmooth. 2n = 240-960.
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