• Bryoria bicolor (Ehrh.) Brodo & D.Hawskw.
Bryoria bicolor
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This attractive but extremely rare lichen forms erect, dense tufts a few centimetres tall that are brown-black below, then become greyer above towards the branch tips. The non-sorediate, upright branches have spiky spinules growing out at right angles. The medulla is patchy PD+ red. The lichen favours acid sites above 250m with stable mossy boulders, especially granites. It still occurs in Wexford and Donegal but was formerly more widespread.

Key characteristics

  • Appears glossy brown and spiky; form dense tufts on acid rocks and low mossy boulders granitic rocks especially
  • The branches are upright with barbed spinules held at right angles.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Bryoria bicolor (Ehrh.) Brodo & D.Hawskw.. [In] LichenIreland. Accessed on 2018-08-20.