Irish lichens

Parmelia saxatilis
Order: Lecanorales       Family: Parmeliaceae

Species: Parmelia saxatilis

Growth type foliose.
Photos: On acidic upland rock. Ballingeary, Cork, SW Ireland.

Blue-grey to greenish-grey thallus, ridged lobes, tips often browned. Simple rhizines. Conspicuous white pseudocyphellae, grey brown isidia form on reticulation and can spread to cover thallus. Apothecia rare, red-brown with thin crenulate or isidiate margins.
Sometimes parasitised by Marchandiomyces corallinus.

Common on walls, rocks and acid barked trees.
Medulla: K+ orange turning red, C-, P+ orange, UV-

Similar: Parmelia sulcata. Sorediate, but isidia are absent.


Parmelia saxatilis       Parmelia saxatilis


Parmelia saxatilis


Parmelia saxatilis


Parmelia saxatilis
Parmelia saxatilis.

Please Contact me if you find errors. All images used are copyright.