Perennial herb with deciduous aerial parts. Rhizome fusiform, 10–15 mm long, 2–3 mm wide;roots numerous, descending, becoming horizontal, probably proliferous. Leaves 1 or 2; stipe 16–25 mm long, 30–40% of its length subterranean, stipe:lamina length ratio 0.7:1, stipe bases shortly persistent; lamina mid-green, held at ± 80° from the ground, elliptic, flat in sterile leaves, concave from above in fertile leaves, 25–50 mm long, 5–10 mm wide, length:width ratio ± 4.5:1, apex acute, apiculate, base narrowly cuneate; venation elongate throughout, with some secondary venation and included blind veinlets, median band lacking; epidermal cells elongate with wavy walls; stomata strongly aligned. Fertile spike 55–90 mm long, with 11–19 pairs of sporangia, fertile spike:lamina length ratio ± 2.5:1. Spores 40–45 µm in equatorial diameter, alete, muri broad, of uneven width and somewhat discontinuous, lumina reduced to narrow pits, granules lacking. Fig. 2/2 (p. 7).