Images of British Lichens
Moelleropsis nebulosa (Hoffm.) Gyeln.
Thallus a cracked, effuse crust of coarse, blue-grey granules, each of which consists of a cluster of cells of the cyanobacterial photobiont enclosed by fungal hyphae; apothecia said to be frequent, about 1mm diameter, with brown discs and granular, thalline margins. On mineral soil, including soil caps on walls, often as a pioneer species, local, predominently western and evidently more frequent near the coast in the south-west.
Refs: Smith et al. (2009), 612; Purvis et al. (1992), 388; Dobson (2005), 273 (photo); Dobson (2011), 280-1 (photo); Wirth, Hauck & Schulz (2013), 2: 760 (photo), 801; Nordic Lichen Flora (2007) 3: 105, 189 (photo); Thor & Arvidsson (1999), 289 (photo); Arup et al. (1997), 189 (photo); McCune & Geiser (2009), 126 (photo); Lichen Atlas of the British Isles 4: 906 (1999).
|On church wall, Slapton, Devon, August 2011 (det. David Hawksworth)|
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Uploaded January 2012, last updated September 2013