Images of British Lichens
Pertusaria aspergilla (Ach.) J.R.Laundon
Thallus rather thin, grey, cracked-areolate, characterised by the small and rounded ('punctiform') soralia scattered over the surface; apothecia unknown. Best separated from similar species by chemical tests. Widespread, locally common on exposed, base-poor rocks in the north and west.
Refs: Smith et al. (2009), 678; Purvis et al. (1992), 452 (as P. dealbescens); Dobson (2005), 323 (photo); Dobson (2011), 324 (photo); Whelan (2011), 127 (photo); Wirth (1995), 2: 696; Wirth, Hauck & Schulz (2013), 2: 842, 853 (photo).
|Braemar, Aberdeenshire, April 2003|
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Uploaded May 2008, last updated January 2016