Rumex aquaticus is a flowering plant in the knotweed family, Polygonaceae.

[1] It is commonly known as the western dock found in aquatic environments.

It is considered a waterside plant due to it needing nutrient rich, watery soil to grow.

[2] Examples of where this plant may grow include lakeside, sides of streams and rivers, or any other environment with access to shallow water.

Rumex aquaticus is a hermaphrodite (both male and female) and is pollinated by wind.