Cladonia foliacea is a species of lichen within the Fungi kingdom that belongs to the Cladoniaceae family. It is commonly found in the Comunidad Valenciana and known by its local name where applicable, although such specific local names can be rare.

This lichen is characterized by its distinctive appearance:

• Color and Form: Cladonia foliacea typically displays a pale green to brownish hue. Its structure is foliose, meaning leaf-like, which is where it derives part of its scientific name "foliacea."
• Habitat: This species is known to grow in a variety of environments including open, sunny areas with poor soil nutrients. It often colonizes sandy or rocky grounds, as well as old tree stumps and logs.
• Ecological Role: Like other lichens, Cladonia foliacea plays an important ecological role. It contributes to soil formation and provides food and habitat for various small organisms. Additionally, it is an indicator of air quality, as lichens are highly sensitive to air pollution.

Cladonia foliacea is one of the many fascinating components of the natural biodiversity in the Comunidad Valenciana, reflecting the region's diverse ecological landscapes.