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Images of British Lichens



Caloplaca cirrochroa (Ach.) Th.Fr.


Thallus a placodioid crust, with narrow, radiating, finger-like lobules, markedly bicoloured, dull orange with lobule tips pale yellow-pruinose, delimited lemon-yellow soralia developing on the lobule surfaces; apothecia orange, rare. Widespread but local on natural outcrops of hard limestones, distribution somewhat western but as determined by substrate availability.

Refs: Gaya (2009), 122, 189 (photo); Wilk (2012), 20 (photo), 42-4; Smith et al. (2009), 258; Purvis et al. (1992), 149; Dobson (2005), 99-9 (photo); Dobson (2011), 108 (photo); Jahns (1983), 246-247 (photo, poor); Wirth (1995), 1: 216 (photo); Wirth, Hauck & Schulz (2013), 1: 283, 296 (photo); Thomson (1997), 155; Lichen Atlas of the British Isles 6: 246 (2001).

 
Caloplaca cirrochroa
Caloplaca cirrochroa
Caloplaca cirrochroa
On limestone in sheltered, coastal gulley, Stackpole, Pembrokeshire, May 2009
 
Caloplaca cirrochroa
Caloplaca cirrochroa, close view
On limestone rocks, Ingleton, Yorkshire, July 2013


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Uploaded July 2009, last updated September 2013