Images of British Lichens
Ochrolechia parella (L.) A.Massal.
Thallus crustose, usually warted, pale grey to buff, soredia generally absent (unless the result of a fungal infection, see Dobson); apothecia usually abundant, thick-rimmed, with pale pink-brown discs, but with the disk surface usually covered by a thick, grey-white pruina. Widespread and often common on base-poor rocks and walls, frequently abundant on rocks above the shoreline, sometimes on nutrient-poor tree bark.
Refs: Smith et al. (2009), 629; Purvis et al. (1992), 399; Dobson (2005), 284-285 (photo); Dobson (2011), 289 (photo); Dalby & Dalby (2005), 21 (photo); Jahns (1983), 254-255 (photo); Allen (2007), 18, 35 & 48 (photos); Whelan (2011), 118 (photo); van Herk & Aptroot (2004), 262-263 (photo); Wirth (1995), 2: 612; Wirth et al. (2004), 222 (photo); Moberg & Holmåson (1984), 207 (photo); Puntillo (1996), plate 26 (photo).
|On siliceous coastal rocks, Prawle Point, Devon, August 2011|
|Grey variant, on siliceous rock island in loch, South Uist, Outer Hebrides, July 2006|
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Uploaded April 2008, last modified December 2012