Irish lichens

Trapelia corticola

Order: Agyriales       Family: Agyriaceae

Species: Trapelia corticola

Growth type crustose.
Photos: Glengarriff woods, Co. Cork, SW Ireland.
Provisional identification by Andy Acton, needs microscopic confirmation

Inconspicuous dull green-brown, granular thallus with scattered puntiform soralia. Soralia pale buff to pale greenish-buff with farinose soredia. Apothecia are very rare, pinkish-brown, sessile. Thallus K-, C+ red, KC+ red, P-, UV+ whitish.

Usually on Oak and Alder in damp, sheltered woodlands, also found on other acid-barked trees. Rarely found on wood.

Similar: Rinodina efflorescens. Soralia C-, P+ red


Trapelia corticola


Trapelia corticola
Trapelia corticola April 2010

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