High Quality Content by WIKIPEDIA articles! Xenolecia is a lichenized genus of fungi within the Lecideaceae family. This is a monotypic genus, containing the single species Xenolecia spadicomma. Lichens are composite organisms consisting of a symbiotic association of a fungus with a photosynthetic partner, usually either a green alga or cyanobacterium. The morphology, physiology and biochemistry of lichens are very different from those of the isolated fungus and alga in culture. Lichens occur in some of the most extreme environments on Earth—arctic tundra, hot deserts, rocky coasts and toxic slag heaps.

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