Irish lichens

Lecanactis abietina

Order: Arthoniales       Family: Roccellaceae

Species: Lecanactis abietina

Growth type crustose.
Photos: Glengarriff woods, Co. Cork, SW Ireland.
Identified by Andy Acton

Thallus whitish to dark grey, thin or effuse. Numerous scattered pycnidia with white-pruinose tips, the pruina C+ red. Often infertile, when present the apothecia are brown and usually thickly grey-green pruinose, the spores 3-septate.
Thallus K-, C-, KC-, UV+ yellow or glaucous grey. Pruina K-, C+ red

Widespread on the dry, shaded side of acid-barked trees in mature woodland. Sometimes on mosses under overhanging acidic rocks.

Similar: Lecanactis subabietina, pruina K+ yellow,
Opegrapha vermicellifera, all chemical reactions negative


Lecanactis abietina


Lecanactis abietina


Lecanactis abietina


Lecanactis abietina
Lecanactis abietina March 2010

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