A lichen - Rhizocarpon petraeum - geograph.org.uk - 1037581

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Summary.mw-parser-output table.commons-file-information-table,.mw-parser-output.fileinfotpl-type-information{border:1px solid #a2a9b1;background-color:#f8f9fa;padding:5px;font-size:95%;border-spacing:2px;box-sizing:border-box;margin:0;width:100%}.mw-parser-output table.commons-file-information-table>tbody>tr,.mw-parser-output.fileinfotpl-type-information>tbody>tr{vertical-align:top}.mw-parser-output table.commons-file-information-table>tbody>tr>td,.mw-parser-output table.commons-file-information-table>tbody>tr>th,.mw-parser-output.fileinfotpl-type-information>tbody>tr>td,.mw-parser-output.fileinfotpl-type-information>tbody>tr>th{padding:4px}.mw-parser-output.fileinfo-paramfield{background:#ccf;text-align:right;padding-right:0.4em;width:15%;font-weight:bold}.mw-parser-output.commons-file-information-table+table.commons-file-information-table,.mw-parser-output.commons-file-information-table+div.commons-file-information-table>table{border-top:0;padding-top:0;margin-top:-8px}@media only screen and (max-width:719px){.mw-parser-output table.commons-file-information-table,.mw-parser-output.commons-file-information-table.fileinfotpl-type-information{border-spacing:0;padding:0;word-break:break-word;width:100%!important}.mw-parser-output.commons-file-information-table>tbody,.mw-parser-output.fileinfotpl-type-information>tbody{display:block}.mw-parser-output.commons-file-information-table>tbody>tr>td,.mw-parser-output.commons-file-information-table>tbody>tr>th,.mw-parser-output.fileinfotpl-type-information>tbody>tr>td,.mw-parser-output.fileinfotpl-type-information>tbody>tr>th{padding:0.2em 0.4em;text-align:left;text-align:start}.mw-parser-output.commons-file-information-table>tbody>tr,.mw-parser-output.fileinfotpl-type-information>tbody>tr{display:flex;flex-direction:column}.mw-parser-output.commons-file-information-table+table.commons-file-information-table,.mw-parser-output.commons-file-information-table+div.commons-file-information-table>table{margin-top:-1px}.mw-parser-output.fileinfo-paramfield{box-sizing:border-box;flex:1 0 100%;width:100%}} 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: 23 November 2007. Source: From geograph.org.uk. Author: Lairich Rig. Attribution(required by the license)InfoFieldLairich Rig / A lichen - Rhizocarpon petraeum / CC BY-SA 2.0. InfoFieldLairich Rig / A lichen - Rhizocarpon petraeum. Camera location55° 58′ 35.5″ N, 4° 36′ 53″ W View all coordinates using: OpenStreetMap 55.976520; -4.614800. Object location55° 58′ 35.5″ N, 4° 36′ 53″ W View all coordinates using: OpenStreetMap 55.976520; -4.614800.