Images of British Lichens
Ochrolechia androgyna (Hoffm.) Arnold
Thallus crustose, thin to rather thick and warted, pale grey or tinged with yellow, with abundant whitish to pale grey to buff or greenish soralia usually covering much of the surface; apothecia with thick, often sorediate margins and yellow-brown discs. Widespread on base-poor rocks and acid tree bark. Variable; recent Scandinavian work suggests this may be a complex of more than one species. Compare Trapelia placodioides.
Refs: Smith et al. (2009), 628; Purvis et al. (1992), 398; Dobson (2005), 283 (photo); Dobson (2011), 288 (photo); Whelan (2011), 118 (photo); van Haluwyn et al. (2009), 160-1 (photo); van Herk & Aptroot (2004, 2013), 262-263 (photo); Wirth (1995), 2: 611 (photo), 612; Wirth, Hauck & Schulz (2013), 2: 781 (photos), 838, 843; Frahm et al. (2010), 92-3 (photo); Moberg & Holmåson (1984), 206 (photo); Holien & Tønsberg (2008), 175 (photo); Stenroos et al. (2011), 297 (photo); Valcárcel et al. (2003), 254-5 (photo); Brodo et al. (2001), 465 (photo); Thomson (1997), 429, 430 (photo).
|saxicolous: Braemar, Aberdeenshire, March 2008|
|lignicolous: on old wooden fence-post, Kindrogan, Perthshire, March 2008,|
showing orange-red reaction with sodium hypochlorite (bleach)
|corticolous: on tree trunk, Kindrogan, Perthshire, April 2003, rubbish photograph but showing apothecia|
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Uploaded April 2008, last modified or updated April 2014 (first hosted at www-biol.paisley.ac.uk, January 2003)