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Peltigera collina (Ach.) Schrad.


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); Stenroos et al. (2011), 316 (photo); Wirth (1995), 2: 678, 681 (photo); Wirth et al. (2004), 91 (photo); Wirth, Hauck & Schulz (2013), 2: 826, 829 (photo); Valcárcel et al. (2003), 284-5 (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).

 
Peltigera collina, wet, close view, showing marginal soralia
Peltigera collina, wet
Wet material on Goat Sallow (Salix caprea), Kindrogan, Perthshire, March 2008
 
Peltigera collina
Peltigera collina, enlarged view showing marginal soralia
On mossy boulder, Glen Tilt, Perthshire, April 2008


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Uploaded May 2008, last updated September 2013