Images of British Lichens
Parmelina pastillifera (Harm.) Hale
(= Parmelia pastillifera (Harm.) R.Schubert & Klem.)
A foliose lichen forming rosettes, lobes grey to blue-grey, often brownish towards lobe margins (as in Hypotrachyna), slightly lustrous, surface faintly marbled, usually developing conspicuous, button-like, blue-black or black isidia; apothecia apparently unknown in Britain. Widespread and locally frequent, especially in the south and west, generally on nutrient-rich bark, sometimes on rocks and other substrates.
Refs: Smith et al. (2009), 657; Purvis et al. (1992), 427 (as Parmelia); Dobson (2005), 305-306 (photo); Dobson (2011), 308 (photo); Whelan (2011), 122 (photo); van Haluwyn et al. (2009), 58-9 (photo); Valcárcel et al. (2003), 274-5 (photo, as Parmelia); Wirth (1995), 2: 646, 665 (photo, as Parmelia); Wirth, Hauck & Schulz (2013), 2: 807, 813 (photo); Frahm et al. (2010), 123 (photo); Nordic Lichen Flora (2011) 4: 90, 163 (photo); Stenroos et al. (2011), 308 (photo); Lichen Atlas of the British Isles 1: 1007 (1995).
|Pembroke, Pembrokeshire, May 2009, lowest photograph shows a young thallus|
|On branch of Ash (Fraxinus excelsior) in humid woodland, Slapton, South Devon, August 2011|
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Uploaded June 2012; updated September 2013