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Cladonia cervicornis (Ach.) Flot.
subsp. verticillata (Hoffm.) Ahti
Podetia cup-like, the cups proliferating from the centre to form tiers, i.e. one cup inside another, soredia absent, basal squamules entire or shallowly lobed, lobes rounded, bluish green when fresh, white beneath, not curled upwards when dry; apothecia small, brown, on the margins of the cups. In heathland, in rock crevices, on drystone walls, etc., widespread but local.
Refs: Van Herk & Aptroot (2003), Bibliotheca Lichenologica 86: 193-203 (photos, as C. verticillata); Smith et al. (2009), 323; Purvis et al. (1992), 207; Dobson (2005), 134; Dobson (2011), 142; Jahns (1983), 218-219 (photo); van Herk & Aptroot (2004), 162-163 (photo, as C. verticillata); Wirth (1995), 1: 311-312, 319 (photo, but might be verticillate variant of subsp. cervicornis, same photo in Wirth et al., 2004, 86); Hansen & Anderson (1995) 27 (photo); Hinds & Hinds (2007, as C. verticillata), 216-217 (photo); Brodo et al. (2001), 245-246 (photo); Thomson (1967) 97-98, plate 5 (photo) (as C. verticillata); McCune & Geiser (2009), 102 (photo, as C. verticillata); Lichen Atlas of the British Isles 2: 370 (1996).
Van Herk & Aptroot (see above) consider this a separate species from C. cervicornis, as C. verticillata (Hoffm.) Schaer., and regard the characters of the basal squamules, rather than the extent of the proliferation of the podetia, as diagnostic. I agree, but for the moment on this site follow the treatments of James, in Smith et al., and Dobson (refs. above). |
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In Breckland lichen heath, near Thetford, Norfolk, in Cladonia community that included C. arbuscula, C. ciliata, C. portentosa, C. gracilis, C. crispata, C. uncialis, C. furcata, C. ramulosa, C. cervicornis subsp. cervicornis, C. foliacea, C. rangiformis, February 2010.
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Near Thetford, Norfolk, same colony as above, taken after heavy rain, April 2010.
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| Montane slope near Ben Lawers, Perthshire, April 2003, a hand-held shot in poor light. |
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© A.J. Silverside
Uploaded March 2008, last updated December 2011 (first hosted at www-biol.paisley.ac.uk, December 2006)
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