Mystery plant

Mystery plant

Observation - Mystery plant - UK and Ireland. Description: Leaves elongate-oval in alternating pairs. Growing in shallow wet ditch by path on mountain with peatland. Possibly one of the water-starworts (Callitriche)?

Leaves elongate-oval in alternating pairs. Growing in shallow wet ditch by path on mountain with peatland. Possibly one of the water-starworts (Callitriche)?