Description: Known only from County Kerry, L. viridans is a small species that grows in the cracks and crevices of hard, including coastal, siliceous rock. It has a C+ orange, K-, finely granular thallus. The disc rim (exciple) is entirely brown in section.

Key Identification Features:

• Thallus, C+ orange, K-, thinly granular, growing in siliceous rock crevices
• Discs 0.2-0.3mm diam.; exciple, brown throughout.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Lecidella viridans at iNaturalist World Species Observations database.