This is Phlebia subceracea, previously known as Mycoacia subceracea, it is not listed in the database under either name so needs to be added please.
It is not always this orange looking, frequently having a more yellow appearance.
Three images, this is Deconica horizontalis, previously recorded as Melanotus hepatochrous in one field guide and as Psilocybe hepatochrous in another guide. It appears on ALA, could the database be updated please.
It is similar to the previous species but has purple/brown spores.
This image shows the full development of the species with tiny furry buttons on the far left through to collapsing and spent mushroom on the far right. Second images shows closer detail of the main group.