Description: This crustose epiphyte grows on the twigs and branches of shrubs and young trees, especially hazel. The thallus is almost reduced to a yellow-grey stain. Through a lens the discs (0.3-1.1mm diam.) are quite unique and resemble brown-black, pimpled fruit gums that have become squashed flat. Search for it on hazel in sheltered situations or around the loughs of the north and west of Ireland.

Key Identification Features:

• The minute, multiple black projections on the brown-black, circular fruits growing on hazel bark are diagnostic
• The spores are three-septate.

Original text submitted by Simon Davey

Distribution Map from NBN: Tomasellia gelatinosa at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Tomasellia gelatinosa at iNaturalist World Species Observations database.