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Images of British Lichens

Lepraria rigidula (de Lesd.) Tønsberg

Thallus pale- to greyish-green, diffuse, loose and granular (leprose), with rather stiffly projecting hyphae (visible with hand-lens) emerging from the coarse soredia; apothecia unknown. On bark and other lichens, widespread and often common in the north and west, but easily overlooked.

Refs: Smith et al. (2009), 540; Purvis et al. (1992), 348 (as Crocynia rigidula); Wirth (1995), 2: 538 (photo); Wirth, Hauck & Schulz (2013), 2: 681 (photo), 682; van Herk & Aptroot (2004, 2013), 234-235 (photo); Lichen Atlas of the British Isles 4: 1715 (1999).

Lepraria rigidula growing over Parmelia sulcata
On Sycamore (Acer pseudoplatanus), Kindrogan, Perthshire, April 2003 (overgrowing Parmelia sulcata)
Lepraria rigidula
On Sycamore (Acer pseudoplatanus), Kindrogan, Perthshire, March 2008

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© A.J. Silverside
Uploaded March 2008, last updated December 2013 (first hosted at, May 2006)