Description: This is a moderate-sized plant which is common in shallow streams, lakes, ponds and marshes. It is sometimes mistaken for watercress (Rorippa nasturtium-aquaticum agg.) with which it often grows.

All names: Apium nodiflorum (L.) Lag.

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

iNaturalist: Apium nodiflorum at iNaturalist World Species Observations database.