Irish lichens
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Order: Verrucariales Family: Verrucariaceae
Species: Verrucaria halizoa Photos: Coastal rocks, Allihies, Co. Cork, SW Ireland. Identification confirmed by John Douglass Small patches of smooth, thin, olive-greenish (occasionally brown) thallus that becomes translucent when wet, occasionally with a thin black prothallus. The perithecia are +/- hemispherical, spores 8-11 x 3.5-5µm. Pycnidia are rare. Microscope photograph below. Coastal in sheltered crevices and on shady rocks in the mid-littoral (barnacle) zone, often found among Verrucaria mucosa and Verrucaria striatula |
