Toninia sedifolia (images of British lichens)

Thallus of scattered to contiguous,smooth, rounded, convex squamules, grey to olive-green or brown, but usually densely white- to bluish-pruinose; apothecia black but again usually densely white-pruinose when young. Widespread but local, on basic rocks, soil and on dunes.

Refs: Smith et al. (2009), 901; Purvis et al. (1992), 605 (as T. caeruleonigricans); Dobson (2005), 429 (photo); Dobson (2011), 436 (photo); van Herk & Aptroot (2004), 364-5 (photo); Wirth (1995), 2: 910, 917 (photo); Wirth et al. (2004), 173 (photo); Moberg & Holmåson (1984), 131 (photo, as T. coeruleonigricans); Puntillo (1996), plate 40 (photo); Hansen & Andersen (1995), 117 (photo); Brodo et al. (2001), 684 (photo); Thomson (1997), 612 (as T. coeruleonigricans).

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Images of British Lichens