Ochrolechia
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Ochrolechia is a genus of crustose lichens in the family Ochrolechiaceae.
Ochrolechia szatalaensis
Ochrolechia africana
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Ochrolechia africana, commonly known as the frosty saucer lichen, is a species of crustose and corticolous (bark-dwelling) lichen in the family Ochrolechiaceae. It is a widely distributed species, found in tropical and subtropical areas of southern Africa, Asia, Australia, North America, and South America. The lichen is characterized by the presence of a white "frosty" or powdery apothecia.
UV-illuminated thallus and apothecia of Ochrolechia africana; the yellowish colour results from the fluorescence of lichexanthone.