Pseudevernia furfuracea (images of British lichens)

Thallus foliose, with narrow, strap-shaped lobes (but shorter, broader lobes with spreading side-lobes when young, sometimes remaining dimorphic), attached at one point and often pendant, so appearing fruticose, lower surface initially white but becoming black, with inturned margins, upper surface becoming isidiate; apothecia rare, large, with shiny, tan-brown disks, shortly stalked. Widespread and often common on acid-barked trees and fence posts, less often on base-poor rocks.

Refs: Smith et al. (2009), 759; Purvis et al. (1992), 506; Dobson (2005), 368 (photo); Dobson (2011), 372 (photo); Britton (2008) 39 (photo); Fox et al. (2003), plate 4 (photo); Jahns (1983), 190-1 (photo); van Haluwyn et al. (2009), 142-3 (photos); van Herk & Aptroot (2004), 322-3 (photo, young material); Wirth (1995), 2: 782-3 (photo); Wirth et al. (2004), 57 (photo); Frahm et al. (2010), 157 (photo); Moberg & Holmåson (1984), 82 (photo); Holien & Tønsberg (2008), 43 (photo); Nordic Lichen Flora (2011) 4: 102, 165 (photo).

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Images of British Lichens