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Images of British Lichens



Lecanora albescens (Hoffm.) Branth & Rostr.


Thallus thick, white, cracked-areolate, apothecia crowded, with thick margins and pinkish brown discs, usually white-pruinose; on sunny faces of calcareous rocks and concrete, common in England, more local in Wales and Scotland.

Refs: Śliwa (2007), 20-1 (photo); Smith et al. (2009), 476; Purvis et al. (1992), 298; Dobson (2005), 213 (photo); Dobson (2011), 218-19 (photo); Whelan (2011), 103 (photo); Wirth (1995), 1: 458-459 (photo); Wirth et al. (2004), 253 (photo); Wirth, Hauck & Schulz (2013), 1: 559 & 588 (photos), 583; van Herk & Aptroot (2004, 2013), 200-201 (photo).

Frequently parasitised by Arthonia apotheciorum, which blackens the apothecia.

 
Lecanora albescens
Wicken Fen, Cambridgeshire, April 2007 (on the base of the wind-pump, where it has been a
rapid re-colonist, following loss of the lichen community after application of preservative to the woodwork)


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Uploaded March 2008, last updated December 2013