Irish lichens - Degelia atlantica

Order: Peltigerales Family: Pannariaceae

Species: Degelia atlantica

Growth type foliose.
Photos: On Ash and Alder. Gougane Barra, Cork, SW Ireland.

Thick bluish-grey lobes with fan-shaped ridges. Grey, globose isidia can cover whole thallus which becomes areolate in centre. Fibrous blackish hypothallus often extending beyond lobes. Apothecia rare.

West of Ireland, usually on basic barked trees, also found on mossy sheltered coastal rocks. Chemical reactions negative.

Similar: D. plumbea and D. ligulata

Degelia atlantica.

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