Irish lichens
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Order: Arthoniales Family: Roccellaceae
Species: Lecanactis abietina 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 March 2010