Agonimia tristicula

A species of calcareous substrates, such as thin rendzinas, mortar or base-rich bark. The thallus comprises a mass of green squamules (grey-brown when dry) in which black, barrel-shaped apothecia can be found. On the Gower cliffs the species has been recorded growing among colonies of Reboulia hemisphaerica (Hemisphaeric Liverwort).
Listed by Alan Orange in Flora of Glamorgan (Wade et al, 1994)