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Lichen: Opegrapha atra

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Lichen: Opegrapha atra

Pale, smooth barked trees often have pale grey or greenish patches with little black specks in the middle of them. This is not a bark blemish but a living lichen. 

Named Opegrapha atra it is the commonest of the family of six British species and possibly the easiest to identify because of these patches that enclose the central speckled marks.

Silver and downy birch, as well as members of the willow family, are the favoured host trees for Opegrapha atra but it also, very occasionally, occurs on fence posts too.

Not much to look at perhaps but nice to know what it is when you see it all the same!


 

If you would like to see the complete series that this post is part of click here ---->
This nature note was written by ----> Peter Orchard
This nature nore was written ----> 2 years 6 months ago

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