Flowering plant in two habitats
Photo: Arne Ader
Translation: Liis
Pink landscape on Pede river. Amphibious bistort flowering
| Amphibious bistort; water knotweed: aquatic form |
Vesi-kirburohi: veevorm
|
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Amphibious bistort; water knotweed:
terrestrial form
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Vesi-kirburohi: maismaavorm
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The aquatic form is common in freshwater bodies and can even cover shallow waters and bays in great stands. It is a perennial with a long, branched rhizome, that sets roots at stem nodes. It may grow nearly a couple of metres high; the leaves are floating and shiny. The pink inflorescences rise out of the water like candles.
In its terrestrial or land variety the plant is often without flowers (when in flower the inflorescence is similar to the aquatic form), height up to half a metre and the leaves are not like the floating leaves but smaller and bristly. The terrestrial variety is rarer too.
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