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Melanelixia subaurifera (Nyl.) O.Blanco et al.
 
(= Parmelia subaurifera Nyl.; Melanelia subaurifera (Nyl.) Essl.)


Thallus green to dull brown, matt to moderately shiny, surface with sparse to clustered punctate soralia and soft, globose isidia about 0.2mm (to 0.4mm) in height, leaving creamy white or yellow scars when rubbed off, medulla and soralia giving positive pink to red reaction with bleach (sodium hypochlorite); apothecia rare. On trees, especially the smaller branches and twigs, rarely rocks, generally common throughout Britain.

Refs: Smith et al. (2009), 572; Purvis et al. (1992), 433 (as Parmelia); Dobson (2005), 264 (photo, as Melanelia); Dobson (2011), 268 (photo); Jahns (1983), 200-1 (photo, as Parmelia); Whelan (2011), 115 (photo); van Haluwyn et al. (2009), 62-3 (photo); van Herk & Aptroot (2004, 2013), 246-247 (photo, as Melanelia); Nordic Lichen Flora (2011) 4: 75, 160 (photo, printed too dark); Wirth (1995), 2: 642, 657 (photo, as Parmelia); Wirth, Hauck & Schulz (2013), 2: 730, 731 (photo); Stenroos et al. (2011), 276 (photo); Frahm et al. (2010), 116 (photo); Valcárcel et al. (2003), 278-9 (photo, as Parmelia); Puntillo (1996), plate 29 (photo, as Parmelia); Hinds & Hinds (2007), 319-320 (photo, as Melanelia) (recommended reference); Brodo et al. (2001), 439-440 (photo, as Melanelia); Walewski (2007), 112 (photo, as Melanelia); McCune & Geiser (2009), 199 (photo); Lichen Atlas of the British Isles 1: 1020 (1995) (as Parmelia).

Closely similar is M. glabratula (q.v.), with which it often grows. Several Melanohalea species are also similar, but are C- (i.e. no bleach reaction).

FGBI: http://fungi.myspecies.info/all-fungi/melanelia-subaurifera (as Melanelia subaurifera)

Melanelixia subaurifera
Kindrogan, Perthshire, March 2008
 
Melanelixia subaurifera
On Sallow (Salix), Tebay, Westmorland, May 2012


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© A.J. Silverside
Uploaded September 2008 (then as Melanelia subaurifera), last updated January 2016