I don't see this often but when I do it looks more clearly fruticose. What is the difference btn this and Candelariella xanthostigmoides? Hoping to learn something!
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Candelaria concolor appears to have tiny flat lobes under a hand lens. The lobes are white beneath, showing that it's foliose. Candelariella xanthostigmoides appears granular with no lower cortex.
I can't see the detail in Di's photo well enough but it doesn't look very fruticose to me. Photo (not a great one - zoom in) below from Ullswater. C xanthostigmoides here is more squamulose than granular.
It was foliose, with tiny rhizines on the white lower cortex, though I agree it doesn’t show very clearly in that photo. Both this and C xanthostigmoides are very common on trees in the midlands. C. concolor is very similar to Xanthoria candelaria/ucrainica/ulophyllodes, (but those are all K+ red).
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