Apium nodiflorum?

Apium nodiflorum?

Observation - Apium nodiflorum?. Description: Loads of this plant causing the ditch to silt up (could be a good thing, or just deprive land lower down of water). Fool's watercress, or marshwort? Many seeds floating in water -look like parsnip seeds,(however not necessarily anything to do with this pl

Loads of this plant causing the ditch to silt up (could be a good thing, or just deprive land lower down of water). Fool's watercress, or marshwort? Many seeds floating in water -look like parsnip seeds,(however not necessarily anything to do with this plant)