Irish lichens - Evernia prunastri

Order: Lecanorales Family: Parmeliaceae

Species: Evernia prunastri

Growth type foliose but appears fruticose.
Photos: On twigs. Co. Cork and Co. Limerick, Ireland

Greyish to yellow-green strap-like thallus, patchy-white beneath. Lobes flattened, upper surface with netted ridges that can become sorediate. Dark red-brown apothecia are only rarely produced.

Usually on acid-barked deciduous trees, occasional on fences or rocks. K+ yellow. Occasionally host to Unguiculariopsis lettaui

Similar: Pseudevernia furfuracea, upper surface isidiate.
Ramalina farinacea, upper and lower surfaces +/- same colour.

Evernia prunastri.

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