Description: This foliose, grey to brown, ‘potato-peel lichen’ of flushed siliceous, slightly calcareous rocks, streams and lough margins is easily recognised by its repeatedly lobed thallus so it resembles the stub of a conical sheaf of paper. It attaches to the substratum via numerous holdfasts. A coating of pruina is nearly always visible on the lobes. Western Ireland.

Key Identification Features:

• Grows into a conical construct containing sheaves of lobes; attached by several holdfasts: upland loughs, seepages and streams
• D. miniatum has a less divided thallus and a single holdfast, D. luridum lacks pruina on the lobes and has a Melzers reagent + red medulla.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Dermatocarpon intestiniforme at iNaturalist World Species Observations database.