freshwater pond plant: id required

freshwater pond plant: id required

Observation - freshwater pond plant: id required. Description: This has arrived under it's own steam in my pond: is it a nice native, maybe some sort of starwort? or an alien such as NZ stonecrop ?

This has arrived under it's own steam in my pond: is it a nice native, maybe some sort of starwort? or an alien such as NZ stonecrop ?