Cladonia strepsilis (images of British lichens)

Thallus a mat or a condensed cushion of basal squamules, typically pale bronze-green above, white beneath, very rarely sorediate; podetia inconspicuous and often sparse or absent, very irregularly strap- or cup-shaped, bearing clusters of small, subglobose, brown apothecia. Identification best confirmed by the diagnostic bright emerald-green reaction with bleach (sodium hypochlorite). Mostly on wet peat or gravel on heaths and moorlands, locally frequent where such habitats exist, especially in northern and upland areas, also on acidic dunes.

Refs: Smith et al. (2009), 336; Purvis et al. (1992), 206; Dobson (2005), 145 (photo); Dobson (2011), 152 (photo); Jahns (1983), 218-219 (photo); van Herk & Aptroot (2004), 158-9 (photo); Holien & Tønsberg (2008), 94 (photo); Thomson (1967) 82, plates 6, figs. 30 (photo); Hinds & Hinds (2007), 208-9 (photo); Brodo et al. (2001), 271-2 (photos); Pope (2005), 7 (photo); Lichen Atlas of the British Isles 2: 420 (1996).

lastdragon.org

Images of British Lichens