Buellia badia (parasitic button lichen) is a dark chocolate-brown crustose areolate lichen of Europe, northern Africa, and North America that starts as a parasite growing on other lichens, such as Aspicilia phaea, gradually then becoming independent growing on rock (sometimes also on hardwood.:229 Areoles may be contiguous or dispersed. Lecideine apothecia are .3 -.9 mm in diameter with black discs, that are initially flat, then become strongly convex as they age. Lichen spot