Cladonia uncialis subsp. biuncialis (images of British lichens)

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, finely powdery on the inner surface, 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 but 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; Dobson (2005), 146 (photo, as species); Dobson (2011), 153 (photo, as species); Britton (2008) 27 (photo); Allen (2007), 22 (photo); Wirth (1995), 1: 296, 342 (photo, as species); Wirth et al. (2004), 76 (photo, as species); Hansen & Andersen (1995), 34 (photo, as species); Lichen Atlas of the British Isles 2: 426 (1996).

lastdragon.org

Images of British Lichens