Perennial, glabrous, sometimes aquatic herb with rhizomes and robust, creeping stems that root at nodes. Leaves occurring singly, or in 2s or 3s from nodes along stems; lamina peltate, c. circular in outline, 2–5 cm across, margin crenate; petiole to 26(–43) cm long; stipules absent. Umbels simple or a once- or twice-interrupted spike or compound umbel with 2–7 whorls, flowers 2–5 per umbel or whorl, more or less sessile, with a minute bract subtending each; peduncle to 10 cm long, shorter than or as long as petiole. Petals creamy yellow. Fruits transversely broad-ellipsoid, c. 2 mm long, 2.5–3 mm wide; mericarp dorsal and intermediate ribs filiform, lateral ones inconspicuous. Flowers spring and summer
GleP, VVP, VRiv, GipP, WaP, NIS, EGL, EGU, WPro, HSF, HNF. Also SA, Qld, NSW. Scattered and uncommon in southern Victoria, but sometimes locally abundant in freshwater swamps, ponds, and along creeks and streams. Recorded in clear water at several metres depth.
Source:
Duretto, M.F. (1999). Apiaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 4, Cornaceae to Asteraceae, pp. 256–258. Inkata Press, Melbourne.
