Photo taken on 22/07/07 at College Lake, near Tring, Herts.
This flowers from June to November, usually preferring clay soils. Its wavy-edged leaves are covered in white pimples (see bottom photo).
Photo taken on 22/07/07 at College Lake, near Tring, Herts.
Photo taken on 22/07/07 at College Lake, near Tring, Herts.