Lecanora dispersa (images of British lichens)

Thallus thin and disappearing or immersed, leaving apothecia scattered to clustered on the substrate surface; apothecia small, usually <1mm diameter, with discs variable in colour but generally grey-brown, margins pruinose, not or only weakly crenulate. Inconspicuous but very common throughout Britain on a variety of substrates, including concrete and rather nutrient-rich rocks, becoming a ubiquitous urban species.

Refs: Smith et al. (2009), 484; Purvis et al. (1992), 304; Dobson (2005), 220 (photo); Dobson (2011), 225 (photo, poorly printed); Fox et al. (2003), plate 8 (photo); Wirth (1995), 1: 458-459 (photo); Wirth et al. (2004), 254 (photo); van Herk & Aptroot (2004), 210-211 (photo); Thomson (1997), 278 (excluding f. albescens).

L. semipallida is a closely similar species with a usually dark grey to black thallus, see Dobson (2011), 225. The photograh of L. dispersa in Brodo et al. (2001), 380, is now considered to be this species.

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Images of British Lichens