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Images of British Lichens

Cladonia uncialis (L.) F.H.Wigg.
subsp. biuncialis (Hoffm.) M.Choisy

Mature podetia without basal sqamules, individual or in loose clusters, whitish to pale yellow-green or grey-green, hollow, thin-walled and brittle, seeming inflated (especially in oceanic Britain), finely powdery on the inner surface (at least in the upper parts), irregularly dichotomously and trichotomously branched, the branches short and stubby, not forming cups but often terminating in clusters of 2 (to 6), small branches surrounding a central hole, the ultimate branch tips pink-brown and usually dichotomously forked; apothecia brown, very rare. Heaths and moors, widespread, locally very common in the north and west, often lying fragmented on the peat surface.
Much more common in Britain than subsp. uncialis.

Refs (subsp. biuncialis only): Smith et al. (2009), 338; Purvis et al. (1992), 204; Nordic Lichen Flora (2013) 5: 84, 109 (photo); Dobson (2005), 146 (photo, as species); Dobson (2011), 153 (photo, as species); Britton (2008) 27 (photo); Allen (2007), 22 (photo); Whelan (2011), 81 (photo); Aptroot et al. (2011), 118-9 (as species, at least upper photo ssp. biuncialis); Wirth (1995), 1: 296, 342 (photo, as species); Wirth et al. (2004), 76 (photo, as species); Wirth, Hauck & Schulz (2013), 1: 374, 414 (photo, as species); Valcárcel et al. (2003), 172-3 (photo, as species);Stenroos et al. (2011), 182 (photo); Hansen & Andersen (1995), 34 (photo, as species); Lichen Atlas of the British Isles 2: 426 (1996).


Cladonia uncialis subsp. biuncialis
In heather moorland, near Schiehallion, Perthshire, August 2009
Cladonia uncialis subsp. biuncialis, close-up
Cladonia uncialis subsp. biuncialis, close-up
Cladonia uncialis subsp. biuncialis, close-up
In sandy heathland, Thetford Warren, Norfolk, February 2010
Cladonia uncialis subsp. biuncialis, shattered thalli on peat surface
Cladonia uncialis subsp. biuncialis
Cladonia uncialis subsp. biuncialis
On degraded montane moorland, Glen Shee, Aberdeenshire, August 2008
Cladonia uncialis subsp. biuncialis on blanket bog surface
With C. portentosa on blanket bog, Isle of Lewis, August 1998

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Uploaded April 2009, last updated January 2016