File:A lichen - Peltigera membranacea - geograph.org.uk - 961132.jpg
A_lichen_-_Peltigera_membranacea_-_geograph.org.uk_-_961132.jpg (640 × 480 pixels, file size: 111 KB, MIME type: image/jpeg)
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Summary[edit]
| Description |
English: A lichen - Peltigera membranacea. The orange-brown discs are the spore-producing structures (apothecia). The pale underside of the lichen was covered in a prominent pattern of raised white veins. Pale rhizines (root-like structures) can also be seen projecting from the underside.
This lichen was growing on the moss-covered base of a tree, just inside the woods. Its upper surface is "bullate" (i.e., covered in blister-like bumps that correspond to the pattern of veins underneath); contrast the smooth upper surface of another very common lichen of this genus: 936434. Another species, P. canina, is somewhat similar, but is "much rarer than P. membranacea and found mainly on rather basic impoverished dunes and sandy soils" [F.S.Dobson, "Lichens – An Illustrated Guide to the British and Irish Species"]. P. membranacea and P. hymenina are among the fewer than 10% of lichens that contain cyanobacteria rather than algae; they both contain Nostoc, the most common cyanobacterial genus occurring in lichens. Nostoc is also found as a free-living organism, occurring as gelatinous sheets, or in other forms; see 1470400. |
| Date | |
| Source | From geograph.org.uk |
| Author | Lairich Rig |
| Attribution (required by the license) | Lairich Rig / A lichen - Peltigera membranacea / |
| 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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Licensing[edit]
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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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 15:58, 22 February 2011 | | 640 × 480 (111 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=A lichen - Peltigera membranacea The orange-brown discs are the spore-producing structures (apothecia). The pale underside of the lichen was covered in a prominent pattern of raised white veins. Pal |
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