Is this OK for Arthonia epiphyscia? I believe it will be a County first for Gloucestershire. Growing on Physcia tenella on wild rose on a Cotswold common.
It fits the description in LGBI3 pretty well, but the overview in FGBI says the spores are hardly constricted, whereas some of these are definitely waisted. There is sometimes a very definite dark belt too, though that is probably just a trick of the optics.
Juliet
Arthonia epiphyscia
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