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Images of British Lichens

Lecanora caesiosora Poelt

Thallus whitish to pale grey, areolate, with areole surfaces brown-flecked to uniformly dark brown-granular, surface sorediate, soralia white or cream, sometimes plae greenish or blue, initially rounded and delimited, later extensive over the thallus surface, apothecia rare; on well-lit faces of siliceous rocks, northern, locally common.

Refs: Smith et al. (2009), 478; Purvis et al. (1992), 300; Dobson (2005), 215-216 (photo); Dobson (2011), 220-1 (photo, poorly printed); Wirth, Hauck & Schulz (2013), 1: 580, 581 (photo); .

Lecanora caesiosora
Lecanora caesiosora
On basalt rocks, Traprain Law, East Lothian, June 2011, variant with blue soralia (shown to me by Brian Coppins)
Lecanora caesiosora
Lecanora caesiosora
On upland siliceous rocks, Braemar, Aberdeenshire, April 2003

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© A.J. Silverside
Uploaded March 2008, last updated September 2013