Irish lichens

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.

Verrucaria fusconigrescens

Verrucaria fusconigrescens
Immediately above: Verrucaria fusconigrescens on coastal wall, February 2009

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