A leafy (foliose) lichen that is pollution tolerant and found throughout much of the world.
The yellow coating on the bark is not a lichen, but an algae.
Punctelia subrudecta s. str.
The yellow lichen in this photo is Xanthoria parietina
Punctelia jeckeri (detail)
Baeomyces rufus, the brown beret lichen
Baeomyces rufus detail showing "brown berets" or apothecia (bowl-shaped fruiting bodies)
Parmelia saxatilis, also known as the salted shield lichen or crottle
Ramalina fraxinea, the cartilage lichen
The centre lichen is unidentified
The lichen at bottom centre of the photo is Rhizocarpon reductum
Lecanora muralis sometimes known as the chewing gum lichen
Lecanora muralis (detail)
Psilolechia lucida (detail)
The yellow lichen in this photo is Xanthoria parietina. The grey lichen is Physcia tenella.
Xanthoria parietina (detail)