• Usnea fragilescens var. mollis (Vain.) Clerc
Usnea fragilescens var. mollis
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(Map updated: 11 August 2009)

This beard lichen is much like other Usnea species in its yellow-green colour but is unlike most in the texture of its thallus which is soft and pliable. It is a fairly large and robust species next to its relatives with a distinctive orange patch just above its blackened base towards which it narrows quite acutely. It is local in humid woodlands, willow swamp etc., throughout Ireland though commoner in the west.

Key characteristics

  • Its flexible nature, acutely narrowing black holdfast with orange streak above, and large size of combed appearance should help identify it
  • The constriction in the thallus towards the base separates it from Usnea subfloridana as does the Pd (a lichen test reagent) + red reaction, Usnea subfloridana being Pd-.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Usnea fragilescens var. mollis (Vain.) Clerc. [In] LichenIreland. Accessed on 2019-05-21.