A foliose species with a white, pale grey or blue-grey thallus. The centre of the thallus is usually obscured by large apothecia with dark brown to black discs and prominent thick margins.
Cortex and medulla: K+ yellow
Physcia aipolia is widespread across Scotland where it is found on the rough nodes of twigs and branches of well-lit trees with nutrient- or base-rich bark. BLS distribution map
Physcia aipolia is distinguished from Physconia distorta on basis of the lack of pruina.
scottishlichens.co.uk 