Peltigera collina (images of British lichens)

Upper surface of fresh thallus grey-brown to blue-grey, grey-brown to grey when dry, smooth to minutely scabrose, margins undulate and densely sorediate; lower surface white-tomentose, with small, simple rhizines and brown veins. Local in the north and west, on mossy trunks and rocks, generally in old forest.

Refs: Vitikainen (1994) 32-35 (photo); Smith et al. (2009), 667; Purvis et al. (1992), 447; Dobson (2005), 316 (photo); Dobson (2011), 317 (photo); Jahns (1983), 238-239 (photo); Whelan (2011), 124 (photo); Nordic Lichen Flora (2007) 3: 116, 193 (photo); van Haluwyn et al. (2009), 84-5 (photos); Moberg & Holmåson (1984), 174 (photo); Holien & Tønsberg (2008), 123 (photo); Arup et al. (1997), 229 (photo); Wirth (1995), 2: 678, 681 (photo); Wirth et al. (2004), 91 (photo); Hansen & Anderson (1995), 49 (photo); Brodo et al. (2001), 507, 508 (photo); McCune & Geiser (2009), 245 (photo).

Compare Nephroma parile (undersides of lobes lacking veins and rhizines); Sticta limbata (thalli of single lobes, undersides of lobes with cyphellae and lacking veins and rhizines).

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Images of British Lichens