Images of British Lichens
Lecanora polytropa (Hoffm.) Rabenh.
Thallus pale ochre yellow or yellow-green to brown, diffuse-granular to continuous and areolate, soredia absent; apothecia usually crowded, discs yellowish to green-brown, sometimes ± translucent green (but then compare L. intricata), smooth and appearing waxy, convex when mature. Widespread and generally very common on siliceous rocks and walls, also on worked wood.
Refs: Smith et al. (2009), 493; Purvis et al. (1992), 311; Dobson (2005), 227, 228 (photo); Dobson (2011), 231 (photo); van Herk & Aptroot (2004), 218-219 (photo); Wirth (1995), 1: 454, 455 (photo); Wirth et al. (2004), 211 (photo); Moberg & Holmåson (1984), 114 (photo); Hansen & Anderson (1995), 95 (photo); Brodo et al. (2001), 387 (photo); Pope (2005), 52 (photo); Thomson (1997), 298-300 (photo).
|On stonework of bridge in town centre, Paisley, Renfrewshire, June 2007|
|On stonework of old bridge, Kindrogan, Perthshire, March 2008|
|Wooden bench, Arbroath, Angus, April 2002|
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Uploaded March 2008, substantially extended November 2008, last updated November 2011 (first hosted at www-biol.paisley.ac.uk, January 2003)