Glabrous creeping herb, rooting at the nodes; internodes often elongate, up to 19 cm. long.
Fruit c. 2·5 × 2 mm., approximately twice as long as the adjacent bract.
Leaves in groups of 3–10, often on short lateral shoots.
Umbels sessile, with fine rays c. 7 mm. long.
Flowers hermaphrodite or male; petals white.