Images of British Lichens
Candelariella medians (Nyl.) A.L.Sm.
Thallus placodioid (i.e. a crust but lobulate at the margins), uniformly yellow or with interior more grey, centre granular to isidiate; apothecia yellow, rare. Widespread, more common in the south and east, on hard, nutrient-enriched, calcareous rocks and more especially on concrete and cement.
Refs: Smith et al. (2009), 277; Purvis et al. (1992), 160; Dobson (2005), 112 (photo); Dobson (2011), 121 (photo); Whelan (2011), 66 (photo); van Herk & Aptroot (2004, 2013), 110-111 (photo); Wirth, Hauck & Schulz (2013), 1: 322, 325 (photo).
|On limestone gravestones, Hatfield Broad Oak, Essex, May 2012, lower photographs show apothecia|
|On concrete wall, Arbroath, Angus, April 2002|
|On harbour wall, Nairn, Nairnshire, July 2008|
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© A.J. Silverside
Uploaded March 2008, last updated January 2016 (first hosted at www-biol.paisley.ac.uk, January 2003)