Description: On acid-barked trees (especially old oaks and pines), this lichen is easily told by its conspicuous and abundant isidia-like pycnidia (stick-like projections of the pale grey-green granular thallus) which are brown to grey, narrow, barrel-shaped and with a gaping opening at the top. The small, pale pinkish, brown frosted discs are commonly associated with mature material. In Ireland, the species is scattered but is commoner in the north.

Key Identification Features:

• Thallus grey-green, granular, scattered with numerous grey-brown barrel-shaped pycnidia (<0.3mm tall)
• On acid-barked oaks and long-standing pines.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Micarea doliiformis at iNaturalist World Species Observations database.