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(Map updated: 11 August 2009)

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 characteristics

• 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