Lichens : Baeomycetales : XylographaceaeLichens

Xylographa parallela (Ach.: Fr.) Behlen & Desberg

Description: Virtually identical to X. trunciseda but differing in the colour of the discs (black when mature) and presence of chemistry: occasionally K+ yellow, Pd+ yellow. Thallus: a scurfy greenish-grey. Tree stumps and slow-rotting softwood. In Ireland, it is known from County Clare and County Kerry.

Key Identification Features:

  • Discs rather elongate (to 2mm long), brown at first, then black when mature
  • Spores often 12–13µm or more long; grows along the grain of dead wood in parklands or in woods with plentiful gaps and clearings.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Xylographa parallela at iNaturalist World Species Observations database.

 Giavarini, Vince J., Simms, Michael J., & Davey, Simon, 2026. Xylographa parallela. (Ach.: Fr.) Behlen & Desberg. [In] Lichen Ireland.
https://www.habitas.org.uk/lichenireland/species.php?item=19156. Accessed on 2026-11-12.