👉 A fraenulum is a type of fungus found in certain ecosystems. Fungi are multicellular organisms that can grow on and even thrive in some parts of our environment, including trees, soil, and even the air. The name "fraenulum" comes from the Latin term for "tree," which refers to the tree-like shape of the fungus. These fungi are known for their ability to produce large amounts of spores that can be dispersed through the air or other means.