Lichens : Lecanorales : ParmeliaceaeLichens

Usnea florida (L.) F.H.Wigg.

Description: This charming and well-loved tree-canopy species is about as close as lichens get to resembling a bunch of flowers. In this species the ‘flower heads’ are represented by the discs. These are edged with a ring of slender branchlets while the stems have a pimply (papillate) surface. The point of attachment is blackened. The whole thallus has a shrubby or tufted appearance. In Ireland, records of this species are thinly scattered.

Key Identification Features:

  • Grey-green shrubby tree-top species (though the trees need not be tall); usually fertile, the discs round and flattened and rimmed with eyelash-like branchlets
  • Main stems minutely pimpled; blackened base with horizontal cracking.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Usnea florida at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Usnea florida at iNaturalist World Species Observations database.

 Giavarini, Vince J., Simms, Michael J., & Davey, Simon, 2026. Usnea florida. (L.) F.H.Wigg.. [In] Lichen Ireland.
https://www.habitas.org.uk/lichenireland/species.php?item=19140. Accessed on 2026-11-12.