Trapeliopsis gelatinosa (images of British lichens)

Thallus a thin, effuse, granular crust, dark green-brown or green-grey, non-reactive with sodium hypochlorite (bleach), soralia small, pale green, contrasting in colour with the thallus surface, becoming coalescent; apothecia dark green-grey to blackish. Mainly in the north and west, on damp, peaty banks and similar substrata

Refs: Coppins & James (1984); Smith et al. (2009), 909; Purvis et al. (1992), 613; Dobson (2011), 439; Wirth (1995), 2: 920.

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Images of British Lichens