Plants terrestrial or epilithic, seasonally green, erect, 10-40 cm high, with creeping subterranean rhizome; leaves on rhizome scalelike, pink, peltate, margin lacerate or fimbriate. Rhizophores restricted to creeping rhizome. Main stems branched in upper part, pinnately branched, reddish or stramineous, unbranched main stem 2-15 cm tall, 1-2.2 mm in diam. in lower part, terete, glabrous; primary leafy branches 4-8 pairs, once or twice pinnately branched, secondary branches once or twice forked, ultimate branches 2.5-4 mm wide including leaves. Axillary leaves symmetrical, oblong-elliptic, 1.2-1.6 × 0.3-0.9 mm, base exauriculate, margin ciliolate at basal half. Dorsal leaves approximate, obliquely falcate, elliptic-lanceolate, or rhombic, 0.8-1.8 × 0.2-0.6 mm, not carinate, base obliquely decurrent, ± peltate, apex long acuminate or aristate, parallel to axis; basiscopic margin ciliolate; acroscopic margin subentire. Ventral leaves distant or approximate, slightly ascending, oblong-falcate or obliquely ovate, 1.4-2 × 0.6-1.2 mm, apex apiculate; basiscopic base slightly dilated, margin subentire or entire, ciliolate at base; acroscopic base not enlarged, not overlapping stem and branches, margin ciliolate. Strobili solitary, terminal, compact, tetragonal, 5-10 × 1.4-2.8 mm; sporophylls uniform, not white-margined, broadly ovate or suborbicular, not keeled, margin ciliolate, apex mucronate; megasporophylls in middle on lower side; microsporangia reniform, rather thin, cells regular; microspores yellowish orange or pale yellow, megaspores whitish or yellowish orange, baculate.
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