Because of their microscopic airborne spores, ferns can grow in many unusual places. A wide range of species that naturally occur on rocky habitats can be found in British towns and cities, particularly in damp and sheltered crevices in walls. This guide illustrates the most commonly found wall ferns. By submitting records of ferns that you see (species name, where, when, and a photo) to email@example.com, you can help us to monitor changes in the urban flora.
Click here to download the guide.