Habitat - Found on decaying wood, amongest Sycamore tres
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.
This is indeed what was generally understood to be Exidia glandulosa, but it was decided that the fungus we called E. glandulosa should be called E. plana.
And the fungus we knew as E. truncata should be called E. glandulosa!
So gmh297 is not wrong in his/her identification, merely a bit behind the times.
The internationally agreed rules of nomenclature that cover plants and fungi were changed to provide a mechanism to avoid such confusions, but most taxonomists either never bother to read the rules (as is sometimes too obvious), or they cannot be bothered to go through the procedure and so let confusion reign for ever more.
Phillips has Exidia glandulosa (Witches' Butter), so does Jordans but adds = Exidia truncata as does Collins. Jordans and Collins have Exidia plana with no other comment. Blacks has Black Witch's Butter Exidia plana.
On 'Wild About Britain' Jordan says
"The problem with all reference books (mine being no exception) is that they very quickly become out of date and such are the pressures on publishing profits that frequent revisions are not economically possible.
To clarify the position, the current British Checklist has Exidia glandulosa as the preferred taxon version, but not Exidia truncata other than as a synonym of E. glandulosa."
How on earth are we poor people interested in fungi supposed to keep track?
Certificate in Contemporary Science (Open)
"To clarify the position, the current British Checklist has Exidia glandulosa as the preferred taxon version, but not Exidia truncata other than as a synonym of E. glandulosa."
But also, the current (printed version of the) British Checklist has Exidia plana as a separate entry, with 'Exidia glandulosa' given as a misapplied synonym.
We do have two species, both of which have been called "glandulosa" at different times.
It would be better if we stuck with "truncata" for the smooth-topped one and "plana" for the convoluted one shown here, dropping the confused "glandulosa" name altogether, but I think the world view might be that this is just British confusion.
Lat/Lng: 53.1843, -4.1076
OS grid ref: SH592673