Hydrocotyle mannii Hook.F.

Slender trailing perennial, rooting at the lower nodes with the flowering tips frequently ascending and ± erect, rising to as much as ± 30 cm. or the height of surrounding herbs or grass, rootlets sparse to dense, lower internodes 0.6–8 cm., stem slender, greenish to red or brownish, striate.. Leaves not peltate, the lamina reniform or almost round, ± 7–50 mm. in diameter, 5–9-lobed with rounded to acute, bluntly to sharply or irregularly denticulate lobes, pilose on both surfaces though sometimes sparingly so above; petiole slender, 0.7–10(–20) cm., pilose throughout or (especially when very long) in the upper 2/3; stipules broadly ovate or oblong-ovate, hyaline (the lower becoming brownish and membranous), entire or shortly denticulate, without purplish streaks, ± 1–2.5 mm.. Inflorescence a rounded capitate umbel of (8–)10–25(–30) flowers, 3–5 mm. in diameter; peduncle (0–)0.3–9(–15) cm., pilose to glabrous; involucre of ± 3–5 broadly or narrowly oblong, membranous, 0.5–1 mm. bracts; pedicels very short; bracteoles narrowly spathulate.. Petals greenish to white, lanceolate, 0.5–0.75 mm.. Fruit laterally compressed, yellowish green (sometimes reddish when ripe) ± 1.5–1.8 × 1 mm., the ribs filiform, very narrow but clearly prominent; stylopodia very flat, ± obsolete; styles spreading, slender, ± 0.4–0.6 mm.

In damp montane habitats