This vegetation includes pioneer saltmarsh plants such as samphire and common cord-grass on the boundary with the sea / tidal river which will be covered by the sea almost daily.
Mae'r llystyfiant hwn yn cynnwys planhigion morfa heli arloesol megis llyrlys a chordwellt ar y ffin â'r môr/afon lanw a fydd yn cael eu gorchuddio gan y môr bron bob dydd.