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Images of British Lichens

Cladonia uncialis (L.) F.H.Wigg.
subsp. uncialis

Closely similar to subsp. biuncialis, but differing in its more compact and upright growth, with podetia terminating in three to five, commonly four, short, abruptly tapering branches surrounding the central hole, giving it a conspicuously stellate appearance when viewed from above, interior surface of podetium not powdery, ultimate branch tips pinkish-brown or purplish pink, commonly tetrachotomous. In coastal grey-dune or inland on gravelly heathland, evidently rare in Britain and currently with authentic records mostly from N.E. Scotland (records away from the north-east are most likely an effect of the "nominate subspecies problem").
The common variant of C. uncialis in Britain is subsp. biuncialis, whereas the present subspecies is evidently more continental in distribution.
British Red Data Book taxon: vulnerable.

Refs (subsp. uncialis only): Smith et al. (2009), 338; Purvis et al. (1992), 204; Nordic Lichen Flora (2013) 5: 83, 109 (photo); Church et al. (1996), 40; van Herk & Aptroot (2004, 2013), 162-3 (photo, as species); Jahns (1983), 211 (photo, as species); Holien & Tønsberg (2008), 83 (photo, as species); Stenroos et al. (2011) 182-3 (photo); Lichen Atlas of the British Isles 2: 1594 (1996); Hinds & Hinds (2007), 216 (photo, as species); Brodo et al. (2001), 278 (photo, as species); Walewski (2007), 86 (photo, as species).

Cladonia uncialis subsp. uncialis
Cladonia uncialis subsp. uncialis
In lichen heath in sandy pine (Pinus sylvestris) forest, Culbin Sands, Morayshire, August 2010
Cladonia uncialis subsp. uncialis
In lichen heath on base-poor river gravels, Mar Estate, Aberdeenshire, April 2008
Cladonia uncialis subsp. uncialis in base-poor dune heath
Cladonia uncialis subsp. uncialis in base-poor dune heath
In base-poor dune heath, Cuthill Links, East Sutherland, July 2008

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Uploaded April 2009, last updated January 2014