Cladonia rangiformis (images of British lichens)

Podetia greyish, richly branched, commonly terminating in spiky tufts with pointed, dark apices, surface of podetia appearing speckled, with groups of green algal cells on a paler background; pycnidia and apothecia dark brown, on the tips of branches. Widespread, generally on dunes or in rather dry, neutral to basic grassland.
Refs: Smith et al. (2009), 334; Purvis et al. (1992), 209; Dobson (2005), 144 (photo); Wirth (1995), 1: 308, 309 (photo); van Herk & Aptroot (2004), 154-155 (photo); Thomson (1967) 117; Lichen Atlas of the British Isles 2: 412 (1996).

lastdragon.org

Alan Silverside's Lichen Pages