Peltigera polydactylon (images of British lichens)

Resembles P. hymenina, with lobes smooth and lustrous to glossy above, dark brown, edges erect and wavy-contorted, lower surface with a network of dark veins that extend as a reticulate pattern to the margins, rhizines sparse, in groups and lines, becoming dark brown; apothecia brown, erect. Evidently upland and rare, true distribution uncertain due to past misapplication of the name to P. hymenina. The spelling "polydactyla" is incorrect.

Refs: Vitikainen (1994) 69-72 (photo); Smith et al. (2009), 671; Purvis et al. (1992), 446; Wirth (1995), 2: 677 (photo), 679; Nordic Lichen Flora (2007) 3: 125, 197 & 198 (photos); Brodo et al. (2001), 517-8 (photos).

lastdragon.org

Images of British Lichens