Irish lichens

Xylographa

Family: Xylographaceae

Species: Xylographa trunciseda Q

Growth type crustose
Photos: On hard wood, Kilcolman, Co. Limerick, Ireland.
Identification uncertain

Elongated pale to dark brown discs following the grain of the wood, roundish to narrowly elipsoid and remaining brown when mature. Asci 8-spored, spores simple, 9-12.5x 4.5-6 µm. Micrograph below. Chemistry negative

Found on worked timber, wooden fencing and dead trees. Most frequent on soft woods. Rarely recorded but possibly overlooked

Similar: Xylographa parallela. Virtually identical but discs initially brown becoming black when mature.


Xylographa

Xylographa

Xylographa

Micrograph
Xylographa
Xylographa trunciseda Q. August 2024

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