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Xanthoria parietina
Foliose, pale- to golden-yellow or orange, grey in shade, lacking isidia or soredia; apothecia usually present, margins concolorous with thallus, disks orange. Throughout Britain, generally very common on nutrient-enriched bark (especially on Elder, Sambucus nigra) and stonework, often abundant on coastal rocks (see, also, X. aureola), further increasing as a result of nitrate/ammonia deposition from atmospheric pollution.
Growing on some rocks at the water's edge in Kenmare Bay, Co Kerry, Ireland
This one is clearly Xanthoria parietina, maritime sunburst lichen.
Very nice pictures. It is very yellow-greenish there in Ireland. In Spain is much more orange since it receives much more sun, have a look: http://www.projectnoah.org/spottings/891...
Arlanda, I added some close up photos of this lichen, and the white one also:
http://www.projectnoah.org/spottings/119...
It looks really like something from outer space!
Thanks Arlanda, I'll try and get some more close up photos of this lichen, as soon as the sun comes out agin!
It could be Xanthoria parietina, whose common name is maritime sunburst lichen but there is too litle detail in the picture to know. It is even more difficult to say with the white crustose lichen