Nymphoides spinulosperma

Perennial; stems to 1.5 m long, floating, stoloniferous. Petioles of basal leaves 11.5–47 cm long; blades very broad-ovate or sometimes near-circular, (2.5–)4–9.5(–12) cm long, usually mildly crenate, sometimes entire, deeply cordate, upper surface often mottled green and maroon-brown, sometimes green only, typically with a small cyclamen-coloured spot at the point of petiole insertion. Flowers heterostylous, in spaced pairs along short inflorescence; calyx 7.5–11 mm long; corolla 24–42 mm diam., lobes 5, with broad laciniate wings, not keeled; stigmas 2. Capsule 7.5–11 mm long, c. equal to calyx; seeds ellipsoid, strongly laterally compressed, 1.1–1.5 mm long, black when mature, moderately densely covered with long fine tapered acute tubercles 6 or more times as long as wide; caruncle circular, prominent. Flowers and fruits mostly Nov.–Feb.