File:A lichen - Rhizocarpon petraeum - geograph.org.uk - 1037581.jpg
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| Description |
English: A lichen - Rhizocarpon petraeum. In older books, this may be listed under the synonym Rhizocarpon concentricum, a name that well describes its appearance. The concentric pattern is formed by many black dots arranged in rings; these individual dots are the spore-producing discs (apothecia).
This lichen was growing on rocks in the northern half of a disused quarry: 1050247. Compare another member of this genus which presents a very different appearance: 954017. |
| Date | |
| Source | From geograph.org.uk |
| Author | Lairich Rig |
| Attribution (required by the license) | Lairich Rig / A lichen - Rhizocarpon petraeum / |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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| Object location | | 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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Attribution: Lairich Rig
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 17:02, 23 February 2011 | | 640 × 480 (115 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=A lichen - Rhizocarpon petraeum In older books, this may be listed under the synonym Rhizocarpon concentricum, a name that well describes its appearance. The concentric pattern is formed by many bla |
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