Stems c. 15–40 cm tall, erect, unbranched below except for occasional sobols at base; branch system in upper half of stem oblong-ovate. Leaves on the main stem to a little below the branches, ±homophyllous, appressed, c. 2–4 mm long, similar to median leaves. Median leaves ovate, nearly equal-sided, c. 0.5–2 mm long; margins denticulate; apex acuminate-acute. Lateral leaves slightly overlapping, oblong to narrowly ovate-falcate, asymmetrical, c. 2.5–4 mm long; basiscopic base truncate; acroscopic base rounded; upper margin minutely toothed, especially towards the base; lower margin straight, entire; apex acute. Strobili c. 1-several cm long; often entirely of 1.5–2 mm long, keeled, ovate, long-acuminate microsporophylls, with denticulate margins; megasporophylls to 2.5 mm long, at base of strobilus or throughout. Megaspores c. 250 µm diam. with low, reticulate ridges. Microspores 15–20 µm diam., rugose.
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