Images of British Lichens
Trapeliopsis wallrothii (Flörke ex Spreng.) Hertel & Gotth.Schneid.
Thallus white to pale grey, with crowded, convex, lobed squamules or squamulose-areolate, often bearing coarse, wart-like isidia that break away leaving circular scars, thallus testing C+ red with bleach (sodium hypochlorite); apothecia grey- or pink-brown. Mainly on thin soil and amongst rocks on the west coast.
Refs: Smith et al. (2009), 910; Purvis et al. (1992), 614; Dobson (2005), 433 (photo); Dobson (2011), 440 (photo); Wirth (1995), 2: 920, 926 (photo); Wirth, Hauck & Schulz (2013), 2: 1110 (photo), 1111; Thor & Arvidsson (1999), 334 (photo); Brodo et al. (2001), 687 (photo).
|On thin soil amongst coastal rocks, Prawle Point, Devon, August 2011|
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Uploaded April 2014