Description: This little olive-green to black ‘jelly lichen’ with a thallus of 3-6cm diam. is an upland species of rather basic streams and lough margins. It is rosette-forming, with numerous lobes attaching closely to the substratum. In addition, numerous finger-like isidia form a thick stubby presence across the surface of the thallus. Discs unknown. Western Ireland.

Key Identification Features:

• Small ‘jelly lichen’ of upland loughs and rivers; rosette-forming
• Consists of numerous, tightly adpressed lobes overgrown with coralloid isidia.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Collema glebulentum at iNaturalist World Species Observations database.