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Rhizome 1–1.5 mm diam.; internode 10–30 mm long; scales ovate, 2.5–3 mm long. Roots 2 or 3 per node. Stem with 2 or 3 leaves. Leaf sheath 10–40 mm long. Leaf blade 5–20 cm long, 0.3–l.2 mm wide; apex obtuse with minute serrations and lateral teeth poorly developed or absent. Male flower: stalk 10–15 mm long; upper anther 3–4 mm long, attached 0.25–0.5 mm above lower one; lower anther 2–3 mm long. Female flower: ovary ovoid, 0.75 mm long; style 10–20 mm long. Fruit usually 2, ovoid to globose, 1.5–2 mm diam.; beak 1 mm long.
Internodes of rhizome 1-3 cm. Scales ovate, membranous. Leaves narrowly linear, 2-8 cm × 0.5-0.8 mm, veins 3, midvein conspicuous, lateral teeth inconspicuous, apex truncate or obtuse; sheaths 1-1.4(-2.8) cm. Flowers small. Peduncle of male flowers ca. 1 cm; anthers ca. 0.5 mm, sometimes with scales at base. Style of female flowers lateral, ca. 1.3 mm. Fruitlet ovoid, ca. 2 mm; beak lateral, ca. 1 mm.
