Description: The K+ yellow thallus of this attractive foliose lichen consists of pale grey radiating rosettes. The fan-like lobes have hair-like cilia on the margins that mix with the grey, granular soralia. Discs are rare. Its habitats range from short coastal grasslands and old sea-pink cushions to mossy tree trunks (often rather high up) of oak, ash, hazel and willow. The species is widespread but local in Ireland.

Key Identification Features:

• The smooth, fan-shaped rosettes of pearl-grey lobes tipped with cilia and soredia is distinctive
• On long-standing mossy trees; sea-pink cushions should be searched.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Heterodermia obscurata at iNaturalist World Species Observations database.