• Acrocordia macrospora A.Massal.
Acrocordia macrospora
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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 (19-26ųm long). In Ireland, the species is known from County Kerry.

Key characteristics

  • 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

 Simms, M. J., (2016). Acrocordia macrospora A.Massal.. [In] LichenIreland. Accessed on 2018-08-21.