Plants stoloniferous. Petiole indistinct; leaf blade linear or subspatulate, 2-29 cm × 2-11 mm, sheathing basally, apex acuminate or obtuse. Inflorescences racemose, 1-10 cm, in 2 or 3 whorls of 3 flowers; bracts elliptic. Flowers unisexual; female flowers not exceeding 2, restricted to lowest whorl, sessile or only with very short pedicels; male flowers with pedicels 0.5-3 cm. Sepals obovate, 5-7 × 3-5 mm. Petals orbicular, 1-1.5 × 1-1.6 cm. Stamens 6-21; anthers yellow. Achenes broadly obovoid, 3-5 × 3-3.5 mm, abaxially cristate, with a broad wing and an adaxial beak. Fl. and fr. May-Nov. 2n = 22*.