Agonimia allobata has a thin, dark green to grey-green, mostly continuous thallus, which forms indistinctive areoles or squamules. The more or less round perithecia with a smooth surface are semi-immersed to nearly sessile. Their colour varies according to age and habitat conditions, from greyish-brown to almost black.
Typical habitats are shaded bases of deciduous trees or protruding roots, from which the lichen often also passes onto the surrounding epiphytic mosses. The species shows a preference for woody plants with higher bark pH and often also for older trees. Rarely, it may be found growing on wood and even terricolous occurrence (plant detritus, mosses, humus) is not exceptional, especially in limestone areas. The lichen occurs mainly in forest ecosystems, especially in old-growth moist valley forests and eventually in parks. From central Europe, A. allobata is relatively rarely reported, probably for being partially overlooked. In the Czech Republic, the species occurs scattered from the lowlands to mountains.taxonomic classification:
All records: 86, confirmed 73. One click on a selected square displays particular record(s), including their source(s).