Irish lichens

Collema auriforme
Order: Peltigerales       Family: Collemataceae

Species: Collema auriforme

Growth type foliose.
Photos: On limestone rock and urban walls. Ireland.

Dark greenish-brown, smooth, erect lobes with patches of coarse globular isidia. Lobes are swollen and jelly-like when wet, becoming black and shrivelled when dry. Apothecia rare, margins isidiate.

Common on moist, shaded mortared walls, tombstones and mossy calcareous rocks. Chemical reactions negative.

Similar: Collema fuscovirens and Leptogium plicatile


Collema auriforme


Collema auriforme


Collema auriforme
Collema auriforme. December 2008 and April 2009

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