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Agonimia tristicula (Nyl.) Zahlb.

Synonyms:

Family: VERRUCARIACEAE

Habitat: Ubiquitous

Description

     Thallus squamulose, with squamules 0.1-1 x 0.5 mm width, 0.1-1mm heigth, crowded, more or less contiguous, flat or convex, sometimes slightly erected, round-shape extremities bearing sometimes granular excrescences, upper cortex with minute papillae, grey-brown, grey-green, greenish, but bright green when moist, lower surface paler. Long perithecia (as barrels), 0.3-0.5 mm across, prominent albeit more or less hidden amongst squamules, blackish. Asci 2-spored. Spores elongated, ellipsoid, strongly muriform, 80-120 x 30-50 µm, colourless but brown-yellowish when mature. Photobiont : Chlorococcales. Chemical spot tests negative. Not rare, found on soil, on old walls slightly or non acidic, sometimes on mossy barks of deciduous trees.*







Agonimia tristicula Le Fret 1
Bernard BOUFFINIER



Agonimia tristicula Coadry 2
Bernard BOUFFINIER



Agonimia tristicula Coadry 1
Bernard BOUFFINIER



Agonimia tristicula Sainte Marie du Ménez Hom
Bernard BOUFFINIER



Agonimia tristicula sur un vieux mur Cast 2
Bernard BOUFFINIER



Agonimia tristicula sur un vieux mur Cast 3
Bernard BOUFFINIER



Agonimia tristicula sur un vieux mur Cast 4
Bernard BOUFFINIER



Agonimia tristicula sur un vieux mur Cast 5
Bernard BOUFFINIER



Agonimia tristicula sur un vieux mur Cast 6
Bernard BOUFFINIER



Agonimia tristicula sur un vieux mur Cast 7
Bernard BOUFFINIER



Agonimia tristicula Pointe de Dinan 2
Bernard BOUFFINIER



Agonimia tristicula Pointe de Dinan 1
Bernard BOUFFINIER



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