Stereum is a genus of fungi that is commonly found in the Comunidad Valenciana, among other regions. These fungi are part of the family Stereaceae and are often referred to as crust fungi due to their thin, crust-like appearance when they grow over the surfaces of dead wood.

Here are some features and characteristics of the Stereum genus:

• Appearance: Stereum fungi typically display a smooth and leathery surface that can vary in color, often presenting shades of brown, orange, or yellow. As they age, these fungi may become more rigid and brittle.
• Habitat: They primarily grow on dead wood, contributing to the decomposition process by breaking down dead tree branches and logs. This occurs in a variety of forest environments, making them a common sight in areas with abundant decaying wood.
• Ecological Role: Stereum fungi play an important ecological role in nutrient cycling within forest ecosystems. By decomposing dead wood, they help recycle nutrients back into the soil, facilitating the growth of other plant life.
• Seasonality: These fungi can be observed year-round but tend to be more noticeable in the wetter seasons when the wood substrate retains more moisture.
• Common Species: One well-known species within this genus is Stereum hirsutum, sometimes referred to locally as "Falso Corcho" due to its cork-like texture. This species and others like it can often be found growing in layers or overlapping clusters on their host wood.

Despite their unassuming appearance, Stereum fungi are integral to biodiversity and forest health in the Comunidad Valenciana and beyond. They provide a fascinating glimpse into the world of fungi and their critical environmental roles.