Now extinct in Ireland, this arctic-alpine lichen has a web-like thallus of pale grey, wart-like granules and brown, stalked discs with a conspicuous margin. It grows on peat, mosses, soil and moribund vegetation. It has only ever been known from County Antrim. Spot tests: K+ yellow.

Key characteristics

• Forms a webbed thallus of grey warty granules with brown, stalked discs
• Mountain tops with some calcareous outcrop.

NBN Atlas mapping: Species account : NBN Atlas UK Species Observations database

iNaturalist: Species account : iNaturalist World Species Observations database

Original text submitted by Vince J. Giavarini