Twenty Common Lichens The British Lichen Society The objective of this project also known as Next Steps is to provide support to newcomers to lichenology by encouraging them to seek out specific lichens that are easy to identify and to record their occurrence using a simplified version of the BLS recording spreadsheet. British Lichens A site devoted to British lichens and containing photographs to help with identification. A key to common lichens on trees in England rECOrd Common name string of sausages lichen Diagnostic characters Thallus green, smooth, with main branches swollen and constricted between the swollen parts like a string of sausages with hanging tassel like side branches which become attached to twigs Fruits not known in the UK. How to identify lichens OPAL Can t identify a lichen Follow the illustrated key of common British lichens on the Key to Nature website Upload your picture to iSpot and let enthusiasts and experts identify your lichen for you Lichen Names The British Lichen Society Lichens Woodland Trust Lichens you may spot on woods and trees It is particularly sensitive to atmospheric pollution and loss of old growth habitat The foliose golden shield lichen, Xanthoria parietina, prefers nutrient enriched bark in sunny areas It is tolerant of nitrogen pollution and is common on farmland. Flavoparmelia caperata Flavoparmelia caperata Jump to navigation Jump to search Flavoparmelia caperata, the common greenshield lichen, is a medium to large foliose lichen that has a very distinctive pale yellow green upper cortex when dry The rounded lobes, measuring mm . . in wide, usually have patches of granular soredia arising from pustules. Lichens and People Uses, Benefits, and Potential Dangers Jan , Symbiosis A lichen is an example of symbiosis a relationship in which two organisms live in a close association The alga in the partnership may be a green alga or an organism that used to be called a blue green alga but is now known as a cyanobacterium Occasionally both an alga and a cyanobacterium are present. List of common names of lichen genera List of common names of lichen genera Sometimes the same genus may have than one widely used common name For example, members of the genus Staurothele are commonly called wart lichens , and also rock pimples Lichen genus common names my come from the shape, color, or other feature of some members of a genus. Species Gallery British Lichens Species names have been updated and follow The Lichens of Great Britain and Ireland or recent changes Number of species illustrated species in genera lichens and parasites New this month March new species Stereocaulon glareosum.