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| | Lichens - Mycology, Biology, Science 23
 Black Lichen: Lichina pygmaeaBlack Lichen: Lichina pygmaea
 Photograph and information on this maritime species and a map showing its distribution in Britain.
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Black Shields: Tephromela atraBlack Shields: Tephromela atra
 Photograph and information on this species with a map showing its distribution in Britain.
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Caloplaca coralloidesCaloplaca coralloides
 Research project by Megan Kelso provides photographs and plenty of information on this lichen which can be found living on rocks close to the sea.
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Catalog of California LichensCatalog of California Lichens
 1575 species have been identified from this state, the great geographic diversity being responsible for the relatively large number of lichens found.
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Checklist of UK Recorded LichensChecklist of UK Recorded Lichens
 Provides a list of all the species known to be found in the United Kingdom.
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Common Orange Lichen: Xanthoria parietinaCommon Orange Lichen: Xanthoria parietina
 Photograph and information on this species and a map showing its distribution round the coasts of Britain.
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Cryptothecia rubrocincta, the Christmas LichenCryptothecia rubrocincta, the Christmas Lichen
 Photographs and article by Tom Volk on this spectacular lichen which can be found in the tropical regions of the Americas.
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The Earthlife Web Lichen Image DirectoryThe Earthlife Web Lichen Image Directory
 About 40 images of lichens, including some unidentified ones.
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FIA Lichen IndicatorFIA Lichen Indicator
 The Forest Inventory and Analysis service in the United States monitors the lichen community in order to assess the impact of air pollution on forest health.
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Growth and Development in LichensGrowth and Development in Lichens
 Each species of lichen has its own preferred substrate. This article describes how and where they grow and the extremes of climate that they can tolerate.
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Identifying North American Lichens: A Guide to the LiteratureIdentifying North American Lichens: A Guide to the Literature
 Provides general lichen references including works for beginners, lichen keys online, and a lichen bibliography by genus.
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Introduction to LichensIntroduction to Lichens
 A lichen is a combination of two organisms which live together intimately. Information on their fossil record, life history and ecology, systematics and morphology.
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Island Moss: Cetraria islandicaIsland Moss: Cetraria islandica
 A description of this species beloved of caribou in winter, and information on its habitat, associates, uses and reproduction.
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Letharia vulpinaLetharia vulpina
 Photograph of Wolf Lichen which in the past was put to many uses by the indigenous peoples in North America.
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LIASLIAS
 Provides a global information system for lichenized and non-lichenized ascomycetes.
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Lichen Determination Keys Available on the InternetLichen Determination Keys Available on the Internet
 Provides links to keys providing details of the lichens that can be found in many countries throughout the world.
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Lichen ImagesLichen Images
 Provides photographs of about 50 species.
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Lichen PicturesLichen Pictures
 Photographs of Acolium hawaiiense, Acroscyphus sphaerophoroides, Anaptychia leucomelos, Bacidia medialis, Bryoria furcellata, B. smithii, Buellia aeruginascens, B. proximata, B. pruinosa, B. tincta, Caloplaca erythrantha and Teloschistes flavicans.
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Lichen Portrait GalleryLichen Portrait Gallery
 Photographs of over eighty species of lichen from North America.
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LichenlandLichenland
 Offers ways to find out more about lichens including Lichenlite, an introduction for children. For more advanced study there is a synoptic key and a comprehensive identification aid.
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LichensLichens
 An illustrated introduction to the lichens with information on their ecology and reproduction.
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Lichens as Bioindicators of Air PollutionLichens as Bioindicators of Air Pollution
 Technical article discussing how lichens play prominent roles in air pollution studies because of their sensitivity to different gaseous pollutants, particularly sulfur dioxide.
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Lichens: Dual OrganismsLichens: Dual Organisms
 Twenty four photographs ranging from lichen covered rock faces, through individual species to magnified sections, published in a pictorial supplement to the Fifth Kingdom.
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Lichens of North AmericaLichens of North America
 Details of the comprehensive book of this name, and an interesting introduction to the biology of lichens and their relationships with man and the environment.
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Orange Sea Lichen: Caloplaca marinaOrange Sea Lichen: Caloplaca marina
 Photograph and information on this maritime species with a map showing its distribution in Britain.
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Parelle: Ochrolechia parellaParelle: Ochrolechia parella
 Photograph and information on this maritime species with a map showing its distribution in Britain.
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Peltigera aphthosa: Green Dog LichenPeltigera aphthosa: Green Dog Lichen
 Photograph and description of this species and information on its range and habitat, its fire risks, associates and reproduction.
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Plants Profile for Fayodia striatulaPlants Profile for Fayodia striatula
 Details of this lichenous member of the family Tricholomataceae.
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Reproduction and Reproductive StructuresReproduction and Reproductive Structures
 Outline with diagrams of the two fundamentally different sorts of reproductive bodies possessed by lichens, and the three main types of vegetative reproduction where pieces of lichen detach.
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Sea Ivory: Ramalina siliquosaSea Ivory: Ramalina siliquosa
 Photograph and information on this maritime species and a map showing its distribution in Britain.
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Tar Lichen: Verrucaria mauraTar Lichen: Verrucaria maura
 Photograph and information on this maritime species with a map showing its distribution round the coasts of Britain.
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Verrucaria mucosaVerrucaria mucosa
 Photograph and information on this maritime species and a map showing its distribution in Britain.
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Walton Hall Nature TrailWalton Hall Nature Trail
 Take a walk through the churchyard to see what lichens grow on the different man-made outcrops of stone.
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The World of LichenologyThe World of Lichenology
 Information on the International Association of Lichenologists, photographs of various lichens and links to other lichen-related websites.
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