Hydrocotyle rivularis

Prostrate perennial with robust stems, rooting at nodes. Leaf-lamina divided to base into 3 segments, to 30 mm across; segments orbicular, (3–)6–11 mm long, (3–)7–15.5(–20) mm wide, the outer pair bilobed, apex obtuse or rounded, margins with rounded teeth, surfaces glabrous; petiole (10–)50–160 mm long, glabrous; stipules membranous and entire. Umbels simple, leaf-opposed, globose, 3–5 mm diam., 7–10-flowered; flowers pedicillate; flowering pedicels 1–1.8 mm long; peduncle (5–)30–50 mm long. Petals white, occasionally with purple margins. Fruits slightly compressed laterally, 0.9–1 mm long, 0.7–0.8 mm wide; mericarps with acute lateral and dorsal ribs, intermediate ones not raised. Flowers Dec.–Feb.