Order: Lecanorales       Family: Ramalinaceae Species: Bacidia biatorina Growth type crustose. Photos: On Oak twig, Dromore, Co. Cork, SW Ireland. Granular or granular-isidiate, pale grey-green thallus, upper surface of granules often grey or brown. Apothecia similar to B. laurocerasi but larger (to 1.3mm), orange-brown or black. Spores 9-16(-22) septate, (43-)60-75(-88) x 2.5-3(-4) µm but often sterile. Pycnidia rare, pale orange, the conidia curved, 9-16 x 0.5 µm. Micrographs below. Chemical reactions negative. Outer edge of dark apothecia K+ violet-purple Rare in Ireland, usually occurs on trunks of mature deciduous trees (often Oak) in old woods and former parklands. Similar: Sterile B. rubella has coarser granules, pale upper surface

Micrographs





Bacidia biatorina December 2024