Images of British Lichens
Peltigera canina (L.) Willd.
Upper surface of fresh thallus grey-brown, with convex wrinkles ('bullate') (compare P. rufescens), ash-grey and lacking wrinkles when dry, densely but minutely felted-tomentose, lacking isidia, margins of main lobes generally down-turned towards the tips but side-margins often erect, crisped-undulate (beware key in Smith et al. (2009)!), lower surface white-tomentose, with irregular, fluffy, confluently-based rhizines. Widespread but local in turf on dunes and on gravelly and sandy soils inland.
Refs: Vitikainen (1994) 29-32 (photo); Smith et al. (2009), 667; Purvis et al. (1992), 443; Dobson (2005), 315 (photo); Dobson (2011), 316 (photo); van Herk & Aptroot (2004), 282-283 (photo); Nordic Lichen Flora (2007) 3: 116, 192 (photo); Moberg & Holmåson (1984), 172 (photo); Holien & Tønsberg (2008), 122 (photo); Brodo et al. (2001), 506-7 (photo); Hinds & Hinds (2007), 358-9 (photo); McCune & Geiser (2009), 239 & 244 (photos).
Over-reported and confused with the larger and much commoner P. membranacea. In dry state, closely resembles P. rufescens, with which it commonly grows; attention to characters of the lower surface is required.
|In sandy, Breckland turf, Thetford, Norfolk, same colony in dry and damp state, April 2010|
|In dune turf, Aberlady Bay, East Lothian, January 2007|
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Uploaded May 2008, last updated December 2011 (first hosted at www-biol.paisley.ac.uk, May 2007)