Roccellin is a term that refers to a type of lichen that often grows on rocks and stones. However, there are also several synonyms for this term that can be used to describe this type of lichen. Some common synonyms for Roccellin include rock-loving lichen, rock tripe, and stone lichen. Additional synonyms for this type of lichen include crustose lichen, foliose lichen, and fruticose lichen. Overall, these synonyms help to provide a broader understanding of the different types of lichen that can be found in nature and the various environments they thrive in.