• Umbilicaria polyrrhiza (L.) Fr.
Umbilicaria polyrrhiza
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(Map updated: 11 August 2009)

Foliose lichen, attached at the centre by an umbilicus. Thick-lobed, the edges often finely divided and distorted, smooth glossy chestnut above with a black felt of protruding, branched hairs below. Discs are uncommon. Mountain rocks: north-west and eastern Ireland.

Key characteristics

  • Lower side densely felted with short, black rhizinae
  • Upper surface dark chestnut brown, smooth and glossy.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Umbilicaria polyrrhiza (L.) Fr.. [In] LichenIreland. Accessed on 2018-12-13.