Images of British Lichens
Hypotrachyna laevigata (Sm.) Hale
(= Parmelia laevigata (Sm.) Ach.)
Thallus foliose, lobes smooth, light grey, rather square at the tips and with side-lobes curved around to enclose the sinuses, edges flat, undersurface black, with repeatedly branched rhizines; soralia rather large, terminal and well delimited, grey to dark grey; apothecia rare, margins smooth or somewhat sorediate. Locally common in damp woodland in high rainfall areas of western Britain.
Refs: Smith et al. (2009), 441; Purvis et al. (1992), 431 (as Parmelia); Dobson (2005), 194 (photo); Dobson (2011), 198-9 (photo); Jahns (1983), 196-7 (photo, as Parmelia); Whelan (2011), 100 (photo); Valcárcel et al. (2003), 270-1 (photo, as Parmelia); Holien & Tønsberg (2008), 52 (photo); Nordic Lichen Flora (2011) 4: 63, 157 (photo); Lichen Atlas of the British Isles 1: 1002 (1995) (as Parmelia).
|Thallus with soralia and an apothecium, on Oak (Quercus petraea), Isle of Bute, October 2008|
|On Oak (Quercus petraea), Loch Lomond, Stirlingshire, October 2008|
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Uploaded March 2009, last updated August 2013