Fern mutation

Common male-fernDryopteris filix-mas . Bipinnate; growth form: shuttlecock; scales are pale brown; sori not yet visible. There is an interesting mutation on the ends of the pinna, a similar phenomenon, known as fasciation, has also been noted to occur on Hart’s tongue fern. Habitat is my back garden in a partially shaded, sheltered spot next to the shed. Location: NE Somerset.