Description: This ‘scripture lichen’ is mainly restricted to the Kerry woodlands of the south-west. The thallus is thin, dull olive or brown and forms small, scattered patches on the bark of hazel, holly, oak and willow. Discs are short, rounded and scattered (often button-like), each with a narrow slit. Spores are 11- to 15-septate. South-west Ireland.

Key Identification Features:

• Thallus in small patches, dull olive-green; discs, short (< 1mm long), knot-like
• Spores 25-60ųm long; 11- to15-septate.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Zwackhia viridis at iNaturalist World Species Observations database.