Irish lichens - Flavoparmelia caperata

Order: Lecanorales Family: Parmeliaceae

Species: Flavoparmelia caperata

Growth type foliose.
Photos: On tree trunks in car park. Macroom, Cork, SW Ireland.

Bluish-grey to apple-green thallus with tranversely wrinkled lobes expanding at apices. Under surface black with light-brown margins and simple rhizines. Coarse granular soredia spreading over lobes, apothecia occasional with sorediate margins.
Medulla and soredia: K+/- dirty yellow, C-, KC+ red, P+ orange-red. Host to the lichenicolous fungus Abrothallus microspermus

Common on well-lit acid-barked deciduous trees. Also found on fences, roofs, headstones and siliceous rocks.

Similar: Flavoparmelia soredians K+ yellow slowly turning red.

Flavoparmelia caperata.

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