Irish lichens

Bacidia biatorina

Order: Lecanorales       Family: Ramalinaceae

Species: Bacidia biatorina

Growth type crustose.
Photos: Glengarriff woods, Co. Cork, SW Ireland.
Provisional identification by Andy Acton, needs microscopic confirmation

Thallus granular or granular-isidiate, pale grey-green, upper surface of granules often grey or brown. Apothecia are similar to those of B. laurocerasi but larger (to 1.3mm) orange-brown or black. The ascospores are longer, curved, 9-16 septate, 60-75 x 2.5-3 Ám. Often sterile. Pycnidia rare, pale orange.
Chemical reactions negative.

Rare in Ireland, 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

Bacidia biatorina
Bacidia biatorina April 2010

All images used are copyright. Please contact me if you find errors.