Description: This species of Acrocordia occurs in a quite different habitat from the rest of the tribe, that is, sheltered siliceous or weakly calcareous rocks in coastal areas, so you will not find it growing on man-made structures. The grey to grey-brown thallus has spherical discs (perithecia) that are rather prominent, without the nipple-like ostiole of A. conoidea. Spores are large (19-26&

371;m long). In Ireland, the species is known from County Kerry.

Key Identification Features:

• Thallus grey with spreading involucrellum over the perithecia and ostiole that is not nipple-like; spores large
• Never on mortar or strongly calcareous rocks; usually on shaded, coastal siliceous rock.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Acrocordia macrospora at iNaturalist World Species Observations database.