Cyphelium

Genus of lichens

Cyphelium is a genus of crustose areolate lichens with cup-like apothecia filled with sooty black spores. The genus is in the family Caliciaceae. The genus has a widespread distribution, especially in north and south temperate regions, and contains about 12 species. Members of the genus are commonly called soot lichens.

This keyword could refer to multiple things. Here are some suggestions: