Order Lichenales is a taxonomic order that consists of some of the most primitive lichen-forming fungi. Lichenales consist of various groups, including the Peltigerineae, Cladoniineae, and Lecanorineae. Synonyms for Order Lichenales include "lichen fungi," "lichens," and "lichen-forming fungi." These synonyms are used to describe the various species of fungi that form lichens on rocks, soil, and trees. Lichens have a wide range of uses, including medicinal, cosmetic, and food purposes. Order Lichenales plays an important role in the ecosystem, improving soil quality, and providing a habitat for other organisms. Understanding the specifics of Order Lichenales and its synonyms is crucial to understanding the importance of these organisms.