Xanthoria parietina
Lichenicolous Telogalla olivieri
Xanthoria parietina, is a common, bright yellow lichen found on trees and sometimes rock. It thrives throughout the valley parts of the Redmire area, but is largely absent from higher moorland. It is commonly parasitised by a lichenicolous fungus Telogalla olivieri, which is quite similar in appearance to its host.
Photograph detail
Slide 1: Xanthoria parietina, growing on a fallen branch of ash, Fraxinus excelsior. November.
Slide 2: Xanthoria parietina, thallus and rounded apothecia, the fruiting bodies. November.
Slide 3: Xanthoria parietina, with Telogalla olivieri (centre and right) growing on Sycamore, Acer pseudoplatanus. Churchyard. December
Slide 4: Xanthoria parietina, with Telogalla olivieri growing on Sycamore, Acer pseudoplatanus. Churchyard. December
Slide 5: Xanthoria parietina, with Telogalla olivieri (centre) growing on Sycamore, Acer pseudoplatanus. Churchyard. December
Slide 6: Xanthoria parietina, section through an apothecium. Photographed at x400, phase contrast illumination. December
Slide 7: Xanthoria parietina, section through an apothecium. Photographed at x1000 oil immersion, phase contrast illumination. Shows asci with spores and paraphyses (sterile filaments). December
Slide 8: Xanthoria parietina, section through an apothecium. Photographed at x1000 oil immersion, phase contrast illumination. Shows asci with spores and paraphyses (sterile filaments). Large green algal cells are also present. December