Lichens : Lecanorales : ParmeliaceaeLichens

Usnea flammea Stirt.

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Usnea flammea

Description: Typically, this beard lichen can grow to a length of eight centimetres. It is a wonderful sight when seen growing on rocks and boulders at exposed sites near the sea. It is short stalked with the main stems worm-like. Frequent annulations occur all along the stems like cylindrical beads threaded together to form a necklace. The base of the stem is not blackened. It also grows widely as an epiphyte. The distribution of this species is predominantly western in Ireland.

Key Identification Features:

  • The pale annular rings, absence of a black base and a generally pollarded appearance serves to indicate this species
  • The bases of the main stems are often smooth with few papillae (pimpled swellings) or isidia showing.

Original text submitted by Simon Davey

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

iNaturalist: Usnea flammea at iNaturalist World Species Observations database.

 Giavarini, Vince J., Simms, Michael J., & Davey, Simon, 2026. Usnea flammea. Stirt.. [In] Lichen Ireland.
https://www.habitas.org.uk/lichenireland/species.php?item=19139. Accessed on 2026-11-12.