Photo taken on 16/07/07 along Grand Union Canal, near Cosgrove, Northants.
This is a waterside plant, so I have only come across it once so far on the first day of the Milton Keynes Boundary Walk. It flowers between June and August.
Photo taken on 16/07/07 along Grand Union Canal, near Cosgrove, Northants.
Photo taken on 22/07/09 along the Aylesbury Arm of the Grand Union Canal, Bucks.
Photo taken on 22/07/09 along the Aylesbury Arm of the Grand Union Canal, Bucks.