Description: This is a tricky species to identify and one that deserves more critical study. Essentially, it resembles the common crustose epiphyte B. rubella (described elsewhere) which has granular-warted thallus. The discs of B. assulata are smaller, and the spores, shorter (c.50&

371;m) by comparison with B. rubella (c.60-70&

371;m). It also has a different thallus that is not granular-isidiate. The species is known in Ireland from Counties Kerry and Carlow. It grows on ash and poplar, also Eucalyptus.

Key Identification Features:

• Similar coloured discs to B. rubella but with a different thallus, smaller-sized discs and shorter spores
• B. assulata has darker discs than B. phacodes.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Bacidia assulata at iNaturalist World Species Observations database.