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Leptogium cyanescens (Rabenh.) Körb.


Thallus consisting of thin, papery, undulate, lobes, each approx. 1cm in width, blue-grey, strongly blue-tinted when dry, lobe surfaces smooth but with sparse to abundant laminal and sometimes marginal isidia; apothecia rare. On mossy trees and rocks, especially in old woodland in the oceanic west, a 'Celtic rainforest' species.

Refs: Smith et al. (2009), 546; Purvis et al. (1992), 353; Nordic Lichen Flora (2007) 3: 34, 184 (photo); Dobson (2005), 248-9 (photo); Dobson (2011), 254 (photo); Holien & Tønsberg (2008), 129 (photo); Thor & Arvidsson (1999), 278 (excellent photo); Stenroos et al. (2011) 247 (photo); Thüs & Schultz (2009), 76-7 (photo); Valcárcel et al. (2003), 234-5 (photo, dry); Brodo et al. (2001), 404 (photo); Hinds & Hinds (2007), 289 (photo); McCune & Geiser (2009), 177 (photo).

Leptogium cyanescens
In cleft in montane cliff, Beinn Airein, Isle of Muck (BLS meeting), June 2012
 
Leptogium cyanescens
Leptogium cyanescens, studio shot
On mossy branch of Hazel (Corylus avellana), Ardilistry, Islay (BLS meeting), May 2011, material very dry, field shot in difficult light conditions, plus studio shot


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Uploaded July 2012, last updated August 2013