The lichens are a group of organisms characterised by a symbiotic relationship between a fungus and a photobiont (photosynthetic organism). The photobiont is usually a green alga or a cyanobacterium (blue-green alga). The fungus is almost always a sac fungus (Ascomycete) but may also be a club fungus (Basidiomycete). Lichens are considered to be ancient in origin, appearing in the earliest known land floras.
Native plants | Environment, land and water | Queensland Government : taken from - https://www.qld.gov.au/environment/plants-animals/plants/native-plants http://creativecommons.org/licenses/by/3.0/au/
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