Description: This scaly, grey to blue-green Cladonia, with red discs, is characteristic of many different habitats, but is probably most often encountered on dead wood. It has upright stalks (podetia) without cups and the thallus is usually scaly below and entirely powdery or granular (sorediate) above. It turns yellow with a dab of Potassium hydroxide (K). It is a common species in suitable habitats throughout Ireland.

Key Identification Features:

• Grey or green-blue with red discs and stalks scaly below but granular powdery above
• Cups absent.

Original text submitted by Simon Davey

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

iNaturalist: Cladonia macilenta at iNaturalist World Species Observations database.