Physcia leptalea (images of British lichens)

A foliose species with narrow, convex lobes bordered by long, conspicuous marginal cilia, lobe surfaces with abundant, distinct white flecks (pseudocyphellae), soralia entirely absent; apothecia with thick rims and dark brown to blue-black, usually grey-pruinose discs. Widespread but local, scarce and probably declining, more frequent in coastal areas of the south-west, on slightly basic bark.

Refs: Smith et al. (2009), 702; Purvis et al. (1992), 468 (as P. semipinnata); Dobson (2005), 340 (photo); Dobson (2011), 341 & front cover (photos); Allen (2007), 40 (photo); Jahns (1983), 250-251 (photo, as P. semipinnata); Whelan (2011), 130 (photo); Nordic Lichen Flora (2002) 2: 36, 98 (photo); van Haluwyn et al. (2009), 90-1 (photo); Moberg & Holmåson (1984), 201 (photo, as P. semipinnata); Thor & Arvidsson (1999), 306 (photo, as P. semipinnata); Hinds & Hinds (2007), 394-5 (photo); Lichen Atlas of the British Isles 3: 1118 (1998).

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Images of British Lichens