Irish lichens

Verrucaria caerulea

Order: Verrucariales       Family: Verrucariaceae

Species: Verrucaria caerulea

Growth type crustose.
Photos: On limestone, the Burren, Co. Clare, Ireland.

Thick, finely cracked thallus, pale-grey or bluish-grey, areoles sometimes translucent or white-pruinose. Perithecia three-quarters to completely immersed.

Occurs on hard, often shaded limestone, particularly in western Ireland. Chemical reactions negative.

Verrucaria caerulea

Verrucaria caerulea
Verrucaria caerulea. BLS meeting, April 2009

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