Order: Verrucariales Family: Verrucariaceae
Species: Verrucaria internigrescens QQ
Photos: Above HWM, Allihies, Co. Cork, SW Ireland.
Correction: Photos shown are of Verrucaria viridula
Thallus superficial, whitish-grey or pale brown. Perithecia are not covered by thallus, 0.32-0.78 mm diam with a well developed involucrellum. Spores (15-)19.5-25(-30) x (7.5-)9-11.5(-13) Ám.
Chemical reactions negative
Coastal on damp siliceous rocks in the upper maritime zone.
Similar: Verrucaria muralis. Spores usually narrower.
Verrucaria March 2012