Description: This is the most delicate of the Irish Phaeographis species. It lacks the conspicuous branching pattern of P. dendritica, the olive-green thallus of P. lyellii and the sole and boomerang-shaped flecking seen in P. smithii. It is generally a shy species with a yellowy thallus when growing on hazel bark – often only to the size of Arthonias such as stellaris and elegans. The brown three- to five-septate spores will easily separate it from species of Graphis and Arthonia. In Ireland, the species is still poorly known.

Key Identification Features:

• Diminutive species of the genus; yellow-grey thallus on hazel
• Spores brown three- to five-septate, 16–25µm long.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Phaeographis inusta at iNaturalist World Species Observations database.