Lichen grows on the side of any block in Caverns and on Cragrock Spires and Idol Head Statues. Over time it spreads and dies, and can spread to any surface. Its colour varies slightly. When harvested with a Sickle, it drops a Lichen Clump, which can then be ground into Ground Lichen.
- Beta 2.0.0: Can now be found anywhere in Caverns underground.
- Beta 1.0.0: Introduced.