Irish lichens
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Order: Lecanorales
Family: Parmeliaceae
Species: Parmelia saxatilis 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 but mite damage can cause similar discolouration (bottom photograph) Common on walls, rocks and acid barked trees. Medulla: K+ orange turning red, C-, P+ orange, UV- Similar: Parmelia sulcata. Sorediate, isidia are absent. |
Parmelia saxatilis.