Small (roughly 1cm size) patches of lemon yellow foliose lichen growing on oak trunk. Miniature very ragged lobes less than 5mm length. Possibly Candelaria concolor.
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
You're probably right but for confirmation its important to test for the K reaction. Candelaria concolor is K- but there are some similar small-lobed Xanthoria's that react K+ crimson
Thank you for the information.
As Jenny says, the K reaction is important. Usually C. concolor forms more solid growths, but I was looking at some yesterday that had this more flattened appearance. However I was not certain until I tested it with K and got no colour change. Very similar is Xanthoria ulophyllodes.
Thank you. It's interesting to learn how decisive the tests can be in separating lichens that look almost the same.
Lat/Lng: 51.26, -0.273
OS grid ref: TQ205526