Amphibious Bistort
Amphibious Bistort on a fishing lake
Flower spikes
Close-up of flowers
Floating leaves
Floating network
Erect terrestrial plant
Persicaria amphibia
Polygonaceae
Late June to September
It is found throughout the country except for parts of the North
and the far Southwest.
See the BSBI distribution map for Amphibious Bistort
It can be a floating plant on lakes, rivers and ditches, and a
terrestrial plant at the edge of water bodies and damp places.
Amphibious Bistort is a native, rhizomatous, perennial herb,
which can be a floating aquatic or an erect terrestrial plant,
growing up to 75cm.
The aquatic plant can form extensive floating mats by rooting
at the nodes.
The terrestrial plant roots at the lower nodes only.
Aquatic plants flower more extensively than the terrestial ones.
Flowers are in dense spikes up to 5cm long.
Individual flowers have 5 pink or red petals, 5 stamens and 2
white, filamentous styles, fused at the base and with white
stigmas.
Leaves are lanceolate.
Lower leaves have longer petioles.
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Amphibious Bistort on a fishing lake
Flower spikes
Close-up of flowers
Floating leaves
Floating network
Erect terrestrial plant
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