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Images of British Lichens

Verrucaria caerulea DC.

Thallus minutely cracked-areolate, usually blue-grey, prothallus dark brown, commonly forming a delimited margin to the colony; perithecia small, numerous, projecting little above the surfaces of the areoles. Widespread but local on hard limestones.

Refs: Smith et al. (2009), 943; Purvis et al. (1992), 635; Orange (2008); Dobson (2005), 454 (photo); Dobson (2011), 461 (photo); Wirth, Hauck & Schulz (2013), 2: 1163, 1165 (photo).

Verrucaria caerulea
Verrucaria caerulea, magnified view
On limestone rocks, Schiehallion, Perthshire, April 2003

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© A.J. Silverside
Uploaded September 2008, last updated September 2013