Xylobolus frustulatus, previously known as Stereum frustulatum, commonly known as the ceramic fungus or ceramic parchment, is a species of crust fungus in the Stereaceae family. The fruit body forms small, hard, flat crust-like aggregations that resemble broken pieces of ceramic tile. These pieces are initially whitish before turning yellow-brown to gray-brown in age. A saprobic species, it grows on well-decayed decorticated stumps, branches and logs of deciduous trees, mainly of the genus Quercus in Asia, northern Europe, eastern North America, but is apparently otherwise unknown in Texas. The early formation of this crust has an exudate (second photo) that is apparently unknown in any literature concerning this species. This is the second site found at the Nature Center, this one on Greer Island, the other near the north power line forest along Ten Mile Bridge Road.