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Images of British Lichens

Cladonia strepsilis (Ach.) Grognot

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; Nordic Lichen Flora (2013) 5: 74, 107 (photo); Dobson (2005), 145 (photo); Dobson (2011), 152 (photo); Jahns (1983), 218-219 (photo); van Herk & Aptroot (2004, 2013), 158-9 (photo); Aptroot et al. (2011), 115 (photo); Holien & Tønsberg (2008), 94 (photo); Stenroos et al. (2011) 170 (photo); Valcárcel et al. (2003), 170-1 (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).


Cladonia strepsilis, thallus, field photograph
Cladonia strepsilis, thallus with podetia, studio photograph
Cladonia strepsilis, podetium, studio photograph
Cladonia strepsilis, podetium, studio photograph
On wet moorland peat, Gleann Leireag, West Sutherland, August 2010

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© A.J. Silverside
Uploaded September 2010, last updated January 2016