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Images of British Lichens



Rhizocarpon lecanorinum Anders


Thallus crustose, bright yellow or sometimes tinged greenish, cracking to produce angular to rounded areoles, some of which are semi-circular, curving around the apothecia; apothecia flat, black, in microscopic section with K- exciple, and with an olive brown, K- or K+ green epithecium. Locally frequent in the north and west, generally upland, on base-poor but sometimes metal-rich rocks.

Refs: Smith et al. (2009), 803; Purvis et al. (1992), 539; Dobson (2005), 388 (photo); Dobson (2011), 392 (photo); Jahns (1983), 208-9 (photo, unusually green); van Herk & Aptroot (2004, 2013), 336-7 (photo, material poorly developed, unrepresentitive); Valcárcel et al. (2003), 336-7 (photo); Wirth (1995), 2: 805, 815 (photo); Wirth, Hauck & Schulz (2013), 2: 982 (photo), 985; Stenroos et al. (2011), 409 (photo); Brodo et al. (2001), 636 (photo).

Rhizocarpon lecanorinum
On montane boulder, Glen Shee, Aberdeenshire, August 2008


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Uploaded September 2012; updated December 2013