Images of British Lichens
Lecanora crenulata (Dicks.) Hook.
Thallus thin and disappearing or immersed, leaving apothecia mostly scattered on the substrate surface; apothecia small, usually <1mm diameter, with discs brown to blackish but thickly grey-pruinose, margins thick, somewhat inrolled, pruinose, neatly incised and crenulate. On limestone, lime-rich mortar and other calcareous substrates, widespread, common in the south, much more local in Scotland but still to be expected where suitable habitat exists.
Refs: Śliwa (2007), 24 (photo); Smith et al. (2009), 483; Purvis et al. (1992), 303; Dobson (2005), 219-20 (photo); Dobson (2011), 224-5 (photo); Wirth (1995), 1: 458, 471 (photo); Wirth, Hauck & Schulz (2013), 1: 586, 595 (photo); Schumm (2011), 225-9 (photos); van Herk & Aptroot (2004, 2013), 208-9 (photo); Thomson (1997), 276-8; Brodo et al. (2001), 381 (photo, as L. hagenii, fide Edwards et al. in Smith et al. (2009)).
|On limestone gravestone, Eriswell, Suffolk, April 2012|
|On limestone church wall, Alwalton, Huntingdonshire, April 2012 (disc colour showing through pruina, or perhaps parasitised?)|
|Damp material after heavy rain, on ancient wall, Coity Castle, Glamorgan, February 2012 (BLS meeing)|
|On limestone church wall, Holme-next-the-sea, Norfolk, July 2009|
Lichens HOME PAGE | Index of Species | Conditions of Use and e-mail contact | References | Site Home Page
© A.J. Silverside
Uploaded August 2013, last updated January 2016