When visitors come to explore Great Smoky Mountains National Park, they have access to a wealth of knowledge highlighting the diversity of plants, animals, and ecosystems found in this special place. Among them are lichens — a lesser-known group of species whose members were largely undiscovered as recently as two decades ago. Since then, the Smokies have grown into a hub of lichen discovery and documentation, with the number of species in the park nearly tripling from 340 to 965.