Agonimia tristicula Incertae sedis
Agonimia tristicula

Growth type squamulose
Chemical results negative

Overgrows moss on mortared walls and calcareous soils, occasional on bark of base-rich trees.

Thallus of tiny, flattened green squamules, greyish-brown when dry, with minute papillae on upper surface. Very small, black, barrel-shaped apothecia are often half-hidden amongst the squamules. Asci 1-2 spored, the spores colourless becoming pale yellow-brown, muriform 70-120 x 25-50 Ám. Microscope photograph below.

Similar: A. octospora. Corticolous, less flattened squamules. Asci 8-spored


Agonimia tristicula


Agonimia tristicula

Microscope photograph
Agonimia tristicula, spores
Agonimia tristicula
Wool, Pamphill and Wareham, Dorset. February 2013, November and December 2016

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