A partly or fully submerged aquatic herb. Floating leaves broadly ovate to cordate-reniform; petiole sheathing at base. Flowers bisexual, sessile on an elliptical prominently winged 'spathe', 3-merous; petals obovate, white with a yellow-spotted base. Fruit oblong-elliptical, rostrate, crowned by the 3 sepals. Seeds fusiform, 1-2 mm long, 0.3-0.7 mm in diameter, with 2 faint slightly curved longitudinal ridges.
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