Description: A perennial species of pools, flushes and brackish marshes near the sea, with solid stems up to 3 ft (90 cm) tall and twice-pinnate leaves with long narrow leaflets. White flowers are borne in umbels.

The plant is similar in general appearance to Oenanthe fistulosa, but that is a plant of inland wet places.

All names: Oenanthe lachenalii C.Gmelin

Distribution Map from NBN: Oenanthe lachenalii at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Oenanthe lachenalii at iNaturalist World Species Observations database.