Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Russulales
Family: Stereaceae
Genus: Stereum (contains 27 species that have a widespread distribution)
Common name: for the species: leaf fungus, wax fungus, shelf fungus.
Stereum is type genus of the Stereaceae family of fungi, in the Russulales order. It is named due to having a shape similar to a stereum (derived from the Greek stereos meaning hard or stiff). Lives on decaying wood.
Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/