Description: Look for this lichen on mossy soils, dunes and disturbed areas of sandy ground. The thallus is hard to see, film-like and scattered with tiny spherical discs (perithecia). It can be up to two-thirds immersed with just the top part of the disc peeping through. In squash, the spore sacs (asci) will be seen to contain two colourless spores (49–60µm in length). In Ireland, it is known only from County Down.

Key Identification Features:

• Discs <0.25µm diam., without a hard outer shell (involucrellum), two-spored asci and colourless spores
• On soft, mossy or sandy soils or dunes.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Polyblastia agraria at iNaturalist World Species Observations database.