File:A lichen - Buellia aethalea - geograph.org.uk - 1068887.jpg
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[edit]DescriptionA lichen - Buellia aethalea - geograph.org.uk - 1068887.jpg |
English: A lichen - Buellia aethalea This lichen species was growing on a boulder on the beach; it occurred in small patches, like those shown here, little more than a centimetre across. These patches are divided up into much smaller areas by a pattern of cracks (like crazy-paving), and numerous tiny black spore-producing discs are also present on the surface; however, these details are only clearly visible through a hand-lens, although the black discs are visible here as a speckling of the lichen's surface. The photo also shows a dark line around each lichen; this is the prothallus, and it contains no algal cells.
This species is "frequent on well-lit siliceous rocks" [Frank S. Dobson, in "Lichens - An Illustrated Guide to the British and Irish Species]; the examples in this photo were indeed found on the sunlit side of the boulder, and the large quartz grains that are visible here show the rock to be silica-rich. |
Date | |
Source | From geograph.org.uk |
Author | Lairich Rig |
Attribution (required by the license) InfoField | Lairich Rig / A lichen - Buellia aethalea / |
InfoField | Lairich Rig / A lichen - Buellia aethalea |
Camera location | 55° 56′ 53.4″ N, 4° 36′ 58″ W ![]() ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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Object location | 55° 56′ 53.4″ N, 4° 36′ 58″ W ![]() ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Lairich Rig and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Lairich Rig
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current | 03:17, 24 February 2011 | ![]() | 480 × 640 (107 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=A lichen - Buellia aethalea This lichen species was growing on a boulder on the beach; it occurred in small patches, like those shown here, little more than a centimetre across. These patches are di |
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