Plants terrestrial or xerophytic, evergreen, erect, 35-75 cm, with creeping subterranean rhizome and stolons; leaves on rhizome and stolons scalelike, peltate, margin lacerate. Rhizophores restricted to base of stem. Main stems branched in upper part, isotomously branched, stramineous, terete, not sulcate, pubescent; branches few, 3 or 4 times pinnately branched, leafy branches pubescent on ventral side, dorsiventrally flattened. Axillary leaves on main stems larger than those on branches, ovate-lanceolate; axillary leaves on branches symmetrical, ovate-lanceolate, 1-1.7 × 0.2-0.7 mm, margin entire. Dorsal leaves on branches asymmetrical, elliptic or falcate, 0.7-1.2 × 0.15-0.4 mm, base decurrent, not peltate, margin entire, involute, apex acuminate, parallel to axis. Ventral leaves slightly ascending, asymmetrical, oblong-ovate or falcate, 1.3-1.9 × 0.4-0.6 mm, margin entire or subentire, involute, apex acute. Strobili solitary, compact, tetragonal, 6-12 × ca. 1 mm; sporophylls uniform, not white-margined, without sporophyll-pteryx, margin entire.
Yunnan [India (Assam), Laos, Myanmar, Thailand, Vietnam].
On rather dry slopes in half-shaded places; 400-1200 m.