Stereum is the type genus of the Stereaceae family of fungi, in the Russulales order.

Their simple, shelving fruiting bodies have a smooth hymenium, lacking gills or tubes.

Like most members or the family Stereaceae, Stereum fruiting bodies lack clamp connections and produce amyloid basidiospores.

In 1959, Zdenek Pouzar created a distinct genus, Haematostereum, for the bleeding species of Stereum, including H. gausapatum, H. rugosum, and H. sanguinolentum.

[2] Modern authors do not consider Haematostereum to be a distinct genus, so it is currently treated as a synonym of Stereum.