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Images of British Lichens

Chrysothrix chlorina (Ach.) J.R.Laundon

Thallus forming a thick (to 1mm.), granular-sorediate crust, greenish- to bright yellow, tending to be more coarsely granular than in the much more common C. candelaris but this difference, formerly used as a key character, is not reliable. Generally on sheltered faces and overhangs of siliceous rocks, rare but locally spectacular, Scottish Highlands, uplands of Wales. (Compare Caloplaca chrysodeta.)

Refs: Smith et al. (2009), 308; Purvis et al. (1992), 188; Dobson (2005), 124; Dobson (2011), 132; Whelan (2011), 69 (photo, the same colony as shown here); Holien & Tønsberg (2008), 197 (photo); Stenroos et al. (2011), 108-9 (photo); Wirth (1995), 1: 291 (photo); Wirth et al. (2004), 304 (photo); Wirth, Hauck & Schulz (2013), 1: 364, 365 (photo); .

Chrysothrix chlorina
Chrysothrix chlorina
On shaded rocks, Braemar, Aberdeenshire, April 2002

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Uploaded March 2008, last modified February 2014 (first hosted at, January 2003)