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Images of British Lichens


Diploicia canescens (Dicks.) A.Massal.


Thallus pure white to bluish white or grey-white, placodioid with radiating lobules, thickly pruinose, with greyish-cream soralia that may coalesce in the centre of the thallus, apothecia small, lecideine, with black discs, generally rare. Widespread, common in the south, becoming rarer and mainly coastal in the north, on rocks, walls, stonework and nutrient-enriched bark, usually where somewhat shaded.

Refs: Smith et al. (2009), 378; Purvis et al. (1992), 235; Dobson (2005), 164-5 (photo); Dobson (2011), 171 (photo); Allen (2007), 19 (photo); Jahns (1983), 254-5 (photo); van Haluwyn et al. (2009), 148-9 (photos); van Herk & Aptroot (2004), 172-173 (photo); Thor & Arvidsson (1999), 159, 263 (photo); Arup et al. (1997), 177 (photo); Wirth (1995), 1: 377 (photo); Wirth et al. (2004), 193 (photo); Frahm et al. (2010), 97 (photo); Brodo et al. (2001), 302-3 (photo).

 
Diploicia canescens
On church wall, Holme next the Sea, Norfolk, July 2009
 
Diploicia canescens
Diploicia canescens
Diploicia canescens, close-up showing soredia
On coastal rocks, Kennedy's Pass, Ayrshire, May 2008 (note it overgrowing old Ramalina)
 
Diploicia canescens, close-up showing soredia
Diploicia canescens, close-up showing soredia
Diploicia canescens, habitat shot
On roadside tree stump (Wych Elm, Ulmus glabra) impregnated with dust, West Saltoun, East Lothian, March 2009


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© A.J. Silverside
Uploaded August 2009, last updated December 2011