• Wadeana dendrographa (Nyl.) Coppins & P.James
Wadeana dendrographa
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(Map updated: 11 August 2009)

This crustose lichen has been recorded from Fermanagh and a few trees in the Killarney area of County Kerry including walnut. This species of rough-barked nutrient-rich trees, bearing large, conspicuous black, flattened boat-shaped discs (lirellae) which can attain a length of 3mm or more have a tendency to align their growth with the grain of the bark. The simple spores (68m long) develop in multispored sacs called asci. Look for it on ash, sycamore, beech and old elm bark. Spot tests negative.

Key characteristics

  • Thallus immersed in the bark; discs large compared to other lirellate lichens, black, boat-like, usually with pointed ends
  • Spores simple, relatively small (<10m long).

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Wadeana dendrographa (Nyl.) Coppins & P.James. [In] LichenIreland. Accessed on 2019-01-16.