Cladonia Kingdom - Fungi Division - Ascomycota Class - Ascomycetes Order - Lecanorales Family - Cladoniaceae Genus - Cladonia Cladonia is a lichen. This is a cup lichen. The specimens shown here could be any number of species. I am not sure at all how to differentiate between the many species. Weeds Taxonomic List List by Scientific Name Text Only List by Scientific Name