Images of British Lichens
Pertusaria leioplaca DC.
Thallus a thin, more or less smooth to somewhat warted, grey-cream to pale green crust, surface with larger, isolated, flat-topped warts, these maturing to contain usually single apothecia with visible rims and deeply sunken discs; asci mostly 4-spored. Widespread and often common, more so in the north and west, on smooth-barked trees in sheltered situations.
Refs: Smith et al. (2009), 683; Purvis et al. (1992), 456; Dobson (2005), 327-8 (photo); Dobson (2011), 328 (photo); van Haluwyn et al. (2009), 184-5 (photo); van Herk & Aptroot (2004, 2013), 290-1 (photo); Valcárcel et al. (2003), 294-5 (photo); Wirth (1995), 2: 698 (photo); Wirth et al. (2004), 280 (photo); Wirth, Hauck & Schulz (2013), 2: 846, 850 (photo).
Sometimes parasitised by Opegrapha pertusariicola.
|On Sallow (Salix), Stackpole, Pembrokeshire, May 2009|
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Uploaded October 2011, last updated February 2014