Thistle's picture

Crustose lichen

Observed: 7th October 2012 By: ThistleThistle’s reputation in Fungi and LichensThistle’s reputation in Fungi and LichensThistle’s reputation in Fungi and LichensThistle’s reputation in Fungi and Lichens
Crustose lichen
Description:

Crustose lichen growing on bark. Is it a Lecanora? (Apologies for the quality of the photo; it seems to be a bit better towards the left.)

Identifications

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Some fungi are very poisonous so a mistaken ID could have serious consequences.

Species interactions

No interactions present.

Comments

AlanS's picture

Growth form

Some describe this as crustose, some call it leprose, some call it leprose as a subdivision of crustose ...

Basically it is a layer of granules, with or without underlying tissue, but it has no upper cortex ('skin').

Added in edit: ref. Lecanora - yes, some Lecanora species, notably L. expallens, become powdery sorediate across the upper surface at maturity, but they are genuinely crustose and initially have an upper cortex, that remains visible at the margins and on young thalli. Here we only see granules.

Alan

Thistle's picture

Many thanks

Helpful comments as always. Very many thanks, Alan.