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This ‘scripture lichen’ is instantly recognisable. With a grey thallus, sometimes barely developed as such and therefore hardly obvious to the observer, it is the black, slit-like discs (0.5-3.0mm long) which grab the attention as they sit wholly perched on the surface of the thallus in tiny, scattered, unbranched clusters. The species is a feature of upland woodlands with high rainfall. It is frequent on the smooth bark of old, crooked holly stands and also on oak. North and west Ireland.
Original text submitted by Vince J. Giavarini