Order: Verrucariales       Family: Verrucariaceae Species: Verrucaria fusconigrescens Growth type crustose. Photos: On acidic coastal rock. Co. Cork, SW Ireland. Mid to dark brown areolate thallus, sometimes locally pruinose with a dark brown to black prothallus. Perithecia are half immersed, the apex usually rounded with +/- inconspicuous ostioles. Common on siliceous coastal rocks above HWM and occasionally occurs inland. Chemical reactions negative. Photograph below on inland rock, Gougane Barra. Identified by John Douglass.

Immediately above: Verrucaria fusconigrescens on coastal wall, February 2009