Growing on painted wood at the edge of The Thames
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.
I hesitate to comment on X. aureola as I got confused here in 2012.
However, both Alan's Website & Jenny's website mention the confusion with the name of this lichen, for X. aureola is now applied to a lichen whose habitat is coastal rocks and inland limestone at high altitude.
There are Xanthoria species with narrow lobes growing on 'wood' as does Candelaria concolor, but the latter does not test crimson-red with KOH. Perhaps Nigel, Alan or Jenny or someone else will come to our aid.
I mistakenly thought that Xanthoria would be so easy to identify - getting to grips with them has become quite a challenge.
Why iSpot is important for recording species and location.
Watch this animation http://www.biota-africa.org/species_richness_animation.php
Lat/Lng: 51.508255, -0.032337
OS grid ref: TQ366806
Directly alongside the river, on the Thames Path, on a broken wooden structure.