Plants terrestrial or epilithic, evergreen, erect, 20-55 cm, with creeping subterranean rhizome and stolons. Rhizophores restricted to base of stem. Main stems branched from middle upward, pinnately branched, stramineous or reddish, unbranched main stem (5-)10-25 cm tall, stem 1-3 mm in diam. in lower part, terete, glabrous; primary leafy branches 5-8 pairs, 2 or 3 times pinnately branched, branchlets dense and regular, ultimate branches 2.5-4 mm wide including leaves. Axillary leaves symmetrical, ovate, 1-2.2 × 0.4-1 mm, base exauriculate, margin denticulate. Dorsal leaves imbricate, ovate-orbicular, 0.6-1.8 × 0.3-0.8 mm, not carinate or slightly carinate, base obliquely subcordate, margin denticulate, apex aristate, parallel to axis or imbricate. Ventral leaves contiguous, slightly ascending, ovate-triangular, 1-2.4 × 0.5-1.8 mm, margin denticulate, apex acute; basiscopic base slightly dilated, margin subentire or denticulate at base; acroscopic base enlarged, broader, not overlapping stem and branches, margin denticulate. Strobili solitary, terminal, compact, tetragonal, 5-15 × 1.4-2.8 mm; sporophylls uniform, white-margined, ovate-triangular, carinate, margin denticulate, apex acuminate; megasporophylls in middle on lower side; microsporangia elliptic-oblong, rather thin, cells regular; microspores yellowish orange, megaspores pale yellow, without equatorial flange.
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Main stem erect and undivided for up to 20 cm, branching alternately thereafter to produce a frond-like growth habit. Lvs dimorphic, 4-ranked. Lvs of 2 lateral ranks spreading, falcate, acute, finely ciliate, (1)-1.5-2-(2.5) mm long, decreasing in size from main stems to apices, widely spaced on main stem, closely imbricate on lateral branches. Lvs of 2 upper ranks appressed to stem, 1-2 mm long, ovate, apices drawn out into fine points. Strobili sessile, sharply 4-angled; sporophylls only slightly smaller than nearest microphylls.
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