Irish lichens

Collema furfuraceum
Order: Peltigerales       Family: Collemataceae

Species: Collema furfuraceum

Growth type foliose.
Photos: On Sycamore trunk and coastal rocks. Cork, SW Ireland.
Specimens confirmed by J Douglass

Black or dark-brownish lobes with conspicuous longitudinal ridges on the upper surface. Dense patches of simple or branched isidea can spread over the whole upper surface. Apothecia are very rare.

Found on coastal rocks and trunks of well-lit deciduous trees.
Chemical reactions negative.


Collema furfuraceum


Collema furfuraceum


Collema furfuraceum
Collema furfuraceum. January and November 2009

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