Images of British Lichens
Pertusaria multipuncta (Turner) Nyl.
Thallus a thin to thick, more or less smooth or somewhat warted, grey crust, surface with larger, isolated, flat-topped warts, these crowned with white soredia but later maturing to contain typically two to three sunken apothecia; asci 1-spored, the spore very large. Predominently in southern and western England, Wales, western Scotland, on trunks, branches and twigs, rarely on rocks.
Refs: Smith et al. (2009), 685; Purvis et al. (1992), 457; Dobson (2005), 328 (photo); Dobson (2011), 329 (photo); Whelan (2011), 128 (photo); Arup et al. (1997), 229 (photo); Thor & Arvidsson (1999), 301 (photo).
|On Sessile Oak (Quercus petraea), Ty Canol, Pembrokeshire, May 2009|
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Uploaded October 2011, updated May 2012