Images of British Lichens
Buellia violaceofusca G. Thor & Muhr
Thallus crustose, immersed in the substrate or thin, greyish white, somewhat granular, with slightly elevated, violet-brown soralia, usual chemical tests negative; apothecia and pycnidia unknown. A rare species on dry bark of mature oaks (Quercus) and Ash (Fraxinus excelsior), known from a few sites in N.E. England and eastern Scotland.
Refs: Smith et al. (2009), 238; Nordic Lichen Flora (2002) 2: 24, 95 (photo); Thor & Arvidsson (1999), 239 (photo).
|On dry bark of mature oak (Quercus), Cawdor Wood, Nairnshire, August 2010 (BLS meeting)|
|On dry bark of mature oak (Quercus), Logie, Morayshire, August 2010 (BLS meeting)|
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