Description: This is a very common dark brown to blackish, crustose lichen occurring mainly on peaty soils and dead wood. The thallus is composed of stick-like granules (isidia) that are easily seen under a hand lens. Small brown discs with a persistent margin are not uncommon. It is frequent in the north of Ireland but perhaps somewhat under-recorded elsewhere.

Key Identification Features:

• Placynthiella uliginosa is composed of rounded and not stick-like granules.
• Very common on damp peat and rotting wood.

Original text submitted by Simon Davey

Distribution Map from NBN: Placynthiella icmalea at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Placynthiella icmalea at iNaturalist World Species Observations database.