Pale green foliose lichen on apple tree
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.
Now known as Flavoparmelia caperata.
If you test the medulla (inner layer of the lobes) and the soredia with a drop of K it will give K+/- dirty-yellow. The very similar Flavoparmelia soredians is K+ yellow going slowly red.
The BLS has details of chemicals used for spot tests here:
Lat/Lng: 50.6, -2.2
OS grid ref: SY9188