Order: Ostropales Family: Graphidaceae
Species: Graphina ruiziana
Photo left on Holly, Gougane Barra, Co. Cork. Identified by Brian Coppins
Whitish or grey-green thallus, sometimes barely developed. The clusters of scattered prominent, elevated, short apothecia are 0.5-2.2mm in length, usually unbranched. True exciple is well developed, +/- shining, sometimes white-pruinose near disc, continuing below hymenium. Discs are narrow and slit-like. Pycnidia are occasional. Asci 8-spored, the spores muriform (usually with 7 transverse septa) 30-45 x 15-18 Ám. Microscope photographs below.
Occurs on smooth, leached bark of Holly, young Oak and Rowan in damp, sheltered, upland woods. Most frequent in western Ireland.
Lichen products absent.
Shown on same thallus as the smaller Graphina pauciloculata