Species: Lecanora dispersa
Photos: On upland and coastal rocks. Co. Cork, SW Ireland.
Thin or evanescent, light-grey or whitish thallus. Small apothecia, pale greenish-grey to dark-brown, sometimes white-pruinose with entire margins that become flexuose or slightly crenulate. Asci 8-spored, 50-65 x 12-18 Ám. Spores simple, (7-)8.5-14 x (3-)4-7 Ám. Microscope photograph below.
Chemical reactions negative.
Common and pollution-resistant. Occurs in urban and rural locations on a wide range of nutrient-rich basic substrates.