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Images of British Lichens
Xanthoparmelia conspersa (Ehrh. ex Ach.) Hale
(= Parmelia conspersa (Ehrh. ex Ach.) Ach.)
Thallus foliose, green-grey or distinctly yellow-grey (but commonly appearing pure grey in digital photographs or with digital printing technology), smooth and somewhat glossy, with usually numerous peg-like isidia on the older lobe surfaces, lower surface black; apothecia frequent, conspicuous, to 1cm in diameter, with red-brown discs and pale, often undulate, crenulate margins. Locally common, especially in the north and west, on exposed, base-poor rocks.
Refs: Smith et al. (2009), 964; Purvis et al. (1992), 429 (as Parmelia); Dobson (2005), 459-60 (photo); Dobson (2011), 467-8 (photo); Jahns (1983), 194-5 (photo, as Parmelia); Allen (2007), 18 & 26 (photos); Fox, Guest & Harmer (2003), plate 2 (photo); van Herk & Aptroot (2004), 292-3 (photo); Hansen & Anderson (1995), 44 (photo); Moberg & Holmåson (1984), 88 (photo, as Parmelia); Holien & Tønsberg (2008), 60 (photo); Nordic Lichen Flora (2011) 4: 132, 172 (photo); Wirth (1995), 2: 639 (photo, as Parmelia), 644; Wirth et al. (2004), 146 (photo, as Parmelia); Brodo et al. (2001), 735, 736 (photo); Hinds & Hinds (2007), 519 (photo); Lichen Atlas of the British Isles 1: 988 (1995) (as Parmelia). |
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On base-poor rock in moorland, Dartmoor, Devon, August 2008
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On base-poor boulder, Aberfoyle, Sirlingshire, March 2009
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On basalt rocks, Traprain Law, East Lothian, June 2011 (yellow colour lost)
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On base-poor rocks on loch shore, Loch Lomond, Stirlingshire, May 2010, in sun and shade (yellow colour lost)
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| Greenish-grey variant, on glacial erratic granite boulder, Shap, Westmorland, April 2012 |
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© A.J. Silverside
Uploaded May 2012
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