Xanthoria parietina is a
foliose, or leafy, lichen. 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
(Wikipedia)