Stems slender, wide-creeping, repeatedly branched, rooting at dichotomies; branches low, ascending or procumbent. Median leaves narrowly ovate, to c. 2 mm long, keeled; base symmetrical, cordate, oblique; margins finely toothed; apex attenuate, acute and recurved. Lateral leaves sessile, oblong to oblong-ovate, c. 2.5 mm long, 1 mm wide, dark green, more widely spaced below, contiguous or overlapping above, dimidiate; margins usually dentate-ciliate on rounded acroscopic base and often finely dentate towards apex, otherwise entire; apex abruptly narrowed, obtuse. Spikes to 8 cm long, 1–1.5 mm wide, usually erect, terminal on ultimate branches; sporophylls homophyllous, similar to median leaves, overlapping. Megaspores 650–750 µm diam., faintly reticulate. Microspores 27–35 µm diam., rugose.
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