Placynthium is a genus of lichen-forming fungi in the family Placynthiaceae. Members of this genus are commonly called blackthread lichens.USDA Natural Resources Conservation Service Name SearchBlackthread Lichen (Placynthium), Encyclopedia of Life
Species Placynthium anemoideum Placynthium asperellum Placynthium australiense Placynthium caesium Placynthium filiforme Placynthium flabellosum Placynthium garovaglii Placynthium glaciale Placynthium hungaricum Placynthium lismorense Placynthium majus Placynthium nigrum Placynthium pannariellum Placynthium petersii Placynthium pluriseptatum Placynthium posterulum Placynthium pulvinatum Placynthium subradiatum Placynthium tantaleum Placynthium tremniacum
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