Psora decipiens
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Thallus: squamules to c. 3-4 mm diam., round, scattered to contiguous, sometimes overlapping, appressed, bright pink-red-brown, not or partly white-pruinose; margin usually white, slightly upturned, entire or somewhat serrated; underside white; lower cortex poorly developed or absent; attached by a hyphal net. Description adapted from Lambley et al. (2009). Map (c) British Lichen Society. |
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Throughout Britain, but rather locally distributed.
On calcareous soils developed over chalk, limestone, shell-sand or mica-schist in open situations, both in montane and lowland habitats.