Physcia adscendens (images of British lichens)

Foliose, lobes with long marginal cilia and usually with helmet-like soralia at the tips; apothecia shortly-stalked with blue-black or thinly pruinose discs. Widespread and common on twigs, bark, walls and concrete, often in company with P. tenella and Xanthoria species as indicators of nitrogen enrichment. Generally more robust than P. tenella, with which it is usually mixed.

Refs: Smith et al. (2009), 700; Purvis et al. (1992), 467; Dobson (2005), 338 (photo); Dobson (2011), 339 (photo); Nordic Lichen Flora (2002) 2: 33, 97 (photo); Jahns (1983), 250-251 (photo); Whelan (2011), 130 (photo); van Haluwyn et al. (2009), 90-1 (photo); van Herk & Aptroot (2004), 296-7 (photo); Wirth (1995), 2: 726, 727 (photo); Wirth et al. (2004), 118 (photo); Frahm et al. (2010), 133 (photo); Moberg & Holmåson (1984), 199 (photo); Hansen & Anderson (1995), 53 (photo); Puntillo (1996), plate 31 (photo); Brodo et al. (2001), 549, 550 (photo); Hinds & Hinds (2007), 390 (photo); Walewski (2007), 121 (photo); McCune & Geiser (2009), 267 (photo); Lichen Atlas of the British Isles 3: 1112 (1998).

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Images of British Lichens