Lichen

Lichen is a type of organism that belongs to the supply class Crude Grades Of Plant Materials in the supply group Nonmetallic Crude Materials. Lichen is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship. It is commonly found in various habitats, including forests, deserts, and tundra regions. Lichen is known for its ability to survive in extreme environmental conditions and is often used in ecological studies as an indicator of air quality and environmental health. Additionally, lichen has been used in traditional medicine and as a source of natural dyes.