Ochrolechia microstictoides (images of British lichens)

Thallus thin, somewhay waxy, greyish white, extensively and coarsely greyish-sorediate; apothecia rare. Predominantly northern and western, frequent on base-poor rocks and acid tree bark, but not easily distinguished from O. turneri, which initially has delimited soralia and is widespread, mostly on nutrient-enriched bark.

Refs: Smith et al. (2009), 629; van Herk & Aptroot (2004), 262-263 (photo). See also: Purvis et al. (1992), 400 (as O. turneri, in part).

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Images of British Lichens