This perennial aquatic plant grows in shallow, clear flowing water near ditches, ponds, lakes and rivers. It grows to heights of between 30cm and 1m and has white flower heads in summer. The leaflets have toothed edges. The characteristic features are a pale ring at the base of the leaf stalk and a smell of parsnip or carrot when crushed. It is frost hardy and should be planted in sun. As this a water-loving plant, plant it in a wetland garden, near a water feature or dam. The rhizomes are used for toothache.