Xanthoria parietina Teloschistaceae
Xanthoria parietina

Growth type foliose. Chemical results: K+ crimson / purple

Common on nutrient-rich rocks, trees, walls and roofs in coastal, rural and urban habitats. Very resistant to air pollution and increasing rapidly due to nitrates and ammonia from car exhausts and agricultural chemicals.

Thallus with large, overlapping, yellow-orange lobes, greyish-yellow in shade. Apothecia are abundant, orange discs with smooth margins. Spores polaricular, 12-16 x 7-9 Ám. Micro photographs below.
Immature thalli can be confused with Xanthoria polycarpa

Host to various lichenicolous fungi including Arthonia molendoi, Illosporiopsis christiansenii, Opegrapha physciaria, Polycoccum slaptoniense and Xanthoriicola physciae


Xanthoria parietina


Xanthoria parietina


Xanthoria parietina

Microscope photographs
XXanthoria parietina


XXanthoria parietina
Xanthoria parietina

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