Rustyback is more common in the west of England so we were delighted to find this population growing on a wall in Norfolk during a Norfolk Flora Group excursion to the Snorings. It was growing on a wall in the mortar cracks together with Wall-rue Asplenium ruta-muraria. Mature specimens of Rustyback are easy to identify from the characteristic pattern of the dense reddish brown scales on the underside of the leaf.