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Images of British Lichens
Opegrapha calcarea Turner ex Sm.
Very variable, thallus thin, white or grey to pale pink or rust, usually more or less immersed in the substrate surface; fruitbodies irregularly nodular to slit-like, branched or stellate, lirellate apothecia. Part of a difficult group commonly requiring microscopic examination of the spores for accurate identification. Widespread, especially on coastal rocks and on base-rich or base-enriched rocks, mortar and cement inland.
Refs: Smith et al. (2009), 637; Purvis et al. (1992), 412 (as O. saxatilis); Dobson (2005), 293 (photo); Dobson (2011), 296 (photo); Allen (2007), 32 (photo); van Herk & Aptroot (2004), 266-268 (photo); Wirth (1995), 2: 622; Wirth et al. (2004), 264 (photo); Puntillo (1996), plate 26 (photo). |
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On church wall, Winterton, Norfolk, January 2010 (BLS meeting)
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On church wall, Holme-next-the-Sea, Norfolk, July 2009
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| On coastal rockface, Arbroath, Angus, April 2002 (det. B.J. Coppins) |
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© A.J. Silverside
Uploaded April 2008, last updated November 2011 (first hosted at www-biol.paisley.ac.uk, January 2003)
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