Order: Lecanorales       Family: Bacidiaceae Species: Tephromela atra var. torulosa Growth type crustose. Photos: On deciduous tree trunk. Gougane Barra, Cork, SW Ireland. Identified by John Douglass Fresh thallus is slightly greenish-white. T. atra var. torulosa has a smaller thallus and apothecia than var. atra. Apothecia are less than 1mm diameter, var. atra has apothecia 1-2.5mm. Occasional on deciduous trees, especially on branches. Cortex K+ yellow, C-, KC+ yellow, P-. Medulla UV+ ice-white. Apothecia purplish in section. Corticolous variety of Tephromela atra

Tephromela atra var. torulosa. August 2009