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Yellow

Growths on rocks, fences, and even well trodden paths fascinate me in the way life thrives in every corner of this planet.
Sunburst lichen on a seashore rocks

Xanthoria parietina is a foliose lichen in the family Teloschistaceae. It has wide distribution, and many common names such as common orange lichen, yellow scale, maritime sunburst lichen and shore lichen. It can be found near the shore on rocks or walls (hence the epithet parietina meaning "on walls"), and also on inland rocks, walls, or tree bark. It was chosen as a model organism for genomic sequencing (planned in 2006) by the US Department of Energy Joint Genome Institute (JGI).
[source: Wikipedia]

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