Description: A pioneer coloniser of wet rocks in small watercourses – especially those threading through long-established woodlands – V. denudata has a smooth, often translucent, pale green to brown thallus and rather sharp, conical black-tipped perithecia showing where the thallus cover has begun to erode. With a mean length of 21.5µm, the spores are on the small side. In Ireland, the species is local.

Key Identification Features:

• Pioneer aquatic lichen of small unpolluted watercourses; thallus pale green to brown, smooth and thin, discs (perithecia) conical almost pyramidal, black at the tip
• Spores rather small.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Verrucaria hydrela at iNaturalist World Species Observations database.