Hydrocotyle L.
Stipules present Hydrocotyle
Leaves not peltate
Leaves divided to the base (or nearly so) into 3–7 segments
Leaf segments large, lanceolate to narrow-lanceolate, acute, tapering gradually to the apex, toothed or lobed; leaf bases fringed; the central segment up to 5 cm long. Flowers white, rather numerous in each umbel; peduncles slender; pedicels filiform, 1–3 mm long. Stems lax, diffuse, up to 50 cm long, rooting at the nodes near the base. Widespread. Sheltered places. Fl. summer Hydrocotyle geraniifolia
Leaf segments rarely more than 6 cm and sometimes less than 3 cm long, cuneate, entire to toothed or lobed, glabrous or sprinkled with a few hairs; leaf bases entire. Peduncles shorter than the leaves; flowers few, nearly sessile, greenish or yellowish. Stems creeping, rooting at the nodes. Widespread. Margins of streams; sheltered places; sometimes a weed in lawns. Fl. summer Hydrocotyle tripartita