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Images of British Lichens



Parmotrema crinitum (Ach.) M.Choisy
 
(= Parmelia crinita Ach.)


A medium sized, foliose species with contorted and ragged, whitish or pale blue-grey or green-grey lobes, with scattered and clustered, cylindrical to coralloid isidia and black cilia on the surfaces and margins, soralia absent, under-surface black, with unbranched rhizines, browner and lacking rhizines near the margins; apothecia rare. Western Britain, also extending along and near the south coast, on rocks, coastal cliffs and mossy trunks, particularly in ancient woodland.

Refs: Smith et al. (2009), 662; Purvis et al. (1992), 432 (as Parmelia); Dobson (2005), 310-11 (photo); Dobson (2011), 311 (photo); Jahns (1983), 194-5 (photo, as Parmelia, printed with blue colour cast in my copy); Whelan (2011), 123 (photo); van Haluwyn et al. (2009), 60-61 (photo); Nordic Lichen Flora (2011) 4: 95, 164 (photo, dried, browned material); Holien & Tønsberg (2008), 58 (photo); Wirth (1995), 2: 645, 675 (photo); Wirth, Hauck & Schulz (2013), 2: 806, 819 (photo); Frahm et al. (2010), 126 (photo); Hinds & Hinds (2007), 349-50 (photo); Brodo et al. (2001), 494 (photo); McCune & Geiser (2009), 232 (photo); Lichen Atlas of the British Isles 1: 989 (1995) (as Parmelia).

Parmotrema crinitum
Parmotrema crinitum, closer view
Parmotrema crinitum, closer view
On cliffs, Isle of Muck (BLS meeting), June 2012
 
Parmotrema crinitum
On mossy oak (Quercus) trunk, Ardilistry, Islay (BLS meeting), May 2011.


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© A.J. Silverside
Uploaded July 2012, updated September 2013