Trapeliopsis viridescens often forms large thalli, which are irregularly sorediate, even without soredia in some parts and then richly fertile with abundant dark crowded apothecia. It might be confused with T. pseudogranulosa, which is however almost always sterile and has orange antraquinones-containing spots on the thallus (K+ purple).
It commonly grows in wet coniferous or mixed old-growth forests with abundance of its typical substrate – decaying wood. The lichen might also be found in managed forests, e. g., on tree stumps, on stands with suitable microclimate. It also grows in peatlands and pine peatlands where it colonises bare peat, e.g., on root plates of uprooted trees. It has boreal-montane distribution and is quite rare in the Czech Republic. Trapeliopsis viridescens occurs in most of the boarder mountains, only rarely at lower elevations, e. g., in ravines of sandstone rock formations with climatic inversion. Locally, it can form very rich populations.taxonomic classification:
All records: 98, confirmed 81. One click on a selected square displays particular record(s), including their source(s).