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Usnea filipendula – one of about 20,000 described species of lichen. The following outline provides an overview of and topical guide to lichens.. Lichen – composite organism made up of multiple species – a fungal partner, one or more photosynthetic partners, which can be either green algae or cyanobacteria, and, in at least 52 genera of lichens, a yeast. [1]
In identification key reference literature, the outcome of chemical spot tests serves as a primary characteristic for determining the species of lichens. There are several other less frequently used spot tests of more limited use that are employed in specific situations, such as to distinguish between certain species.
A lichen (/ ˈ l aɪ k ən / LIE-kən, UK also / ˈ l ɪ tʃ ən / LI-chən) is a hybrid colony of algae or cyanobacteria living symbiotically among filaments of multiple fungi species, along with yeasts and bacteria [1] [2] embedded in the cortex or "skin", in a mutualistic relationship.
Mudd published his first paper, on lichens of the Cleveland area, in 1854. He also produced books and exsiccatae.. William Mudd (1861) A Manual of British Lichens, description of all the species and varieties, five plates, with figures of the spores of one hundred and thirty species, illustrative of the genera 309 pp. together with a collection of specimens, the exsiccata Herbarium Lichenum ...
Dobson was the author of several other books in addition to Lichens: An Illustrated Guide to the British and Irish species. These included: Frank S. Dobson, A Field Key to Lichens on Trees (2013), 110pp ISBN 978-0-9542324-6-7; Frank S. Dobson, A Field Key to Coastal and Seashore Lichens (2011), 100 pp ISBN 978 0 9542324 5 [8]
Lichens are composite organisms, consisting of a fungal mycobiont and one or more photosynthetic partners (either green algae or cyanobacteria, or both). One or more ...
With the exception of calicioid lichens, lichen growth forms are based on the appearance of the thallus, which is the vegetative (non-reproductive) part of the lichen. [5] In most species, this form is determined by the lichen's fungal partner, though in a small number, it is instead the alga or cyanobacteria (the lichen's photosynthetic ...
Chrysothrix chlorina, the sulphur dust lichen, is a species of leprose (powdery) crustose lichen in the family Chrysotrichaceae. [3] Originally described scientifically by the Swedish lichenologist Erik Acharius over 200 years ago, it has been shuffled to many different genera in its taxonomic history before finally being transferred to Chrysothrix in 1981.