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Images of British Lichens

Pertusaria pseudocorallina (Lilj.) Arnold

Thallus smooth to cracked and warted, pale grey or brownish grey, surface usually isidiate, the isidia brown-tipped, constricted at the base and like minute balloons, breaking away to leave raised, rounded scars resembling minute white apothecia; actual apothecia rare, several per wart. Widespread on base-poor rocks, often common on sea cliffs.

Refs: Smith et al. (2009), 686; Purvis et al. (1992), 458; Dobson (2005), 330 (photo); Dobson (2011), 230 (photo, poorly printed); Allen (2007), 30 (photo); Whelan (2011), 122 (photo); Valcárcel et al. (2003), 296-7 (photo); Wirth (1995), 2: 695; Wirth et al. (2004), 229 (photo); Wirth, Hauck & Schulz (2013), 2: 840, 841 (photo).

Pertusaria pseudocorallina
Pertusaria pseudocorallina, isidia
On coastal rocks, St. Agnes Head, Cornwall, August 2008
Pertusaria pseudocorallina, isidia
On coastal rocks, Mull of Galloway, Wigtownshire, April 2013

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© A.J. Silverside
Uploaded March 2009, last updated September 2013