Plants on rock or terrestrial, forming loose to dense mats. Stems not readily fragmenting, tips not upturned; creeping stems filiform, indeterminate, branching dichotomously; upright stems stout, unbranched (3--10 cm aboveground), terminating in simple strobili. Leaves green, lanceolate, 3--4.5 X 0.75--1.2 mm (smaller on horizontal stems, 1/3 less than those on upright stems); abaxial groove absent; base decurrent, forming saclike structure with stem; margins with soft spiny projections, 0.1--0.2 mm; apex acuminate to subulate. Strobili (1--)2--3(--5) cm; sporophylls lanceolate-triangular, 4.5--6 X 1.15--1.5 mm, lacking abaxial ridges. 2 n = 18.
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