Lecanactis abietina Roccellaceae
Lecanactis abietina

Growth type crustose
Chemical results: Thallus K-, C-, KC-, UV+ yellow or glaucous grey.
Pruina K-, C+ red

Can be frequent on dry, shaded, acid-barked trees in mature woodland.

White or greyish thallus with abundant scattered pycnidia, the tips white-pruinose. Often infertile, when present apothecia are brown and usually very thickly grey-green pruinose, the spores 3-septate.

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

Lecanactis abietina

Lecanactis abietina
Lecanactis abietina
Wessex Lichen Group meeting, New Forest, Hants. December 2012

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