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Images of British Lichens

Trapeliopsis flexuosa (Fr.) Coppins & P.James

Thallus a thick crust, consisting of rather obscurely delimited, tiny, cushion-like, granular areoles, pale- or blue-grey to blue-green, usually densely covered by coalescent, grey-green to blue-green soralia, thallus testing red with sodium hypochlorite (bleach); apothecia green-black to black, rarely paler or pinkish in shade (Purvis et al.). Widespread and often common, especially on old, worked wood.

Refs: Coppins & James (1984); Smith et al. (2009), 908; Purvis et al. (1992), 613; Dobson (2005), 432 (photo); Dobson (2011), 439 (photo); Whelan (2011), 146 (photo); van Herk & Aptroot (2004, 2013), 368-9 (photo); Frahm et al. (2010), 52-3 (photo); Wirth, Hauck & Schulz (2013), 2: 1111, 1114 (photo); Brodo et al. (2001), 686 (photo); Thomson (1997), 622, 623 (photo).


Trapeliopsis flexuosa
Trapeliopsis flexuosa
On old wooden bench, Wicken Fen, Cambridgeshire, April 2006
Trapeliopsis flexuosa, close view
Greyer variant in close view, on old wooden fence, Kindrogan, Perthshire, March 2008

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© A.J. Silverside
Uploaded January 2009, last updated January 2016