• Pseudevernia furfuracea (L.) Zopf [33]
Pseudevernia furfuracea
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(Map updated: 11 August 2009)

This foliose to shrubby epiphytic lichen has a thallus (to 10cm diam.) of trailing strap-shaped lobes reminiscent of Evernia prunastri (described elsewhere) but differing in its light grey upper surface stubbled with granular outgrowths (isidia) and having a black-mottled lower surface. Discs are uncommon. It is mostly present in hilly districts growing on exposed bark, wooden fencing and siliceous rocks. There are two varieties. In var., furfuracea the medulla is C- (fresh bleach); in var. ceratea, it is C + rose-red. North and east Ireland mostly.

Key characteristics

  • Resembling Evernia prunastri but lobes with a roughened, silver-grey upper surface and black-mottled lower surface
  • Upland sites: rocks and boulders, trees (especially coniferous plantations) and exposed untreated timber.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Pseudevernia furfuracea (L.) Zopf [33]. [In] LichenIreland. Accessed on 2018-12-18.