Seasonal Wild Flowers

Amphibious Bistort

Persicaria amphibia

Polygonaceae

Late June to September

It is found throughout the country except for parts of the North

and the far Southwest.

For a map see the National Biodiversity Network Gateway

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.

Amphibious Bistort on a fishing lake

Flower spikes

Close-up of flowers

Floating leaves

Floating network

Erect terrestrial plant