Description: At first glance this species may appear to be C. citrina, but a quick look through a lens will confirm that the thallus is non-sorediate and arranged like miniature granular rosettes, lobed at the edges. It is known only from south Kerry, but is probably more widespread.

Key Identification Features:

• Like C. citrina in size, but non-sorediate
• It forms tiny granular rosettes with lobed edges (granules such as these are termed blastidia).

Original text submitted by Vince J. Giavarini

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

iNaturalist: Flavoplaca arcis at iNaturalist World Species Observations database.