The fungus Bulgaria inquinans (commonly known as black bulgar) is an Ascomycete in the family Bulgariaceae. It grows on dead oak and hornbeam.

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Keywords: ascomycete, black, branches, bulgar, bulgaria, bulgariaceae, dead, felled, fungus, gelatinous, hornbeam, inquinans, lichen, north, oak, rubbery, trunks, wales