PLANT HEIGHT : Water surface, to 1m deep.
FLOWER SIZE : 3–4mm wide.
FRUIT : Four small nutlets, each 3–4mm long.
FLOWERING TIME : May–September.
SIMILAR SPECIES : Frogbit , which has white flowers; Amphibious Bistort.
The broad leaves of this aquatic plant, Broad-leaved Pondweed, appear to be hinged at the base, enabling them to float flat on the water surface, while longer, narrower leaves are submerged. The tiny green flowers, which have no petals, are borne in short spikes held above the water. Unusually for a water plant, they are wind-pollinated; contact with water sterilizes the pollen.
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