지의류, or lichens, are unique organisms formed from a symbiotic relationship between fungi and algae or cyanobacteria. They can thrive in various environments, including rocky surfaces, tree bark, and soil. Lichens are known for their ability to withstand harsh conditions, making them important indicators of environmental health. These organisms come in various shapes and colors, often appearing as crusty patches or leafy structures. 지의류 play a crucial role in ecosystems by contributing to soil formation and providing food for some animals. They also have been used in traditional medicine and as natural dyes in various cultures.