Umbilicaria decussata

Motivated by their wish to acquire basic knowledge on the elemental content of lichens in Antarctic regions and in Antarctica itself, a few authors collected and analyzed samples in different sites in and around this isolated continent. Bargagli et al. (1993) measured the Hg content of two species of macrolichens, Umbilicaria decussata and Usnea antartica, sampled on the coast of northern Victoria Land. These lichens contained higher Hg levels than lichens in other remote areas. It was suggested that a certain part of the airborne Hg, accumulated in the lichen, derived from local volcanic activity. 

Afghanistan) melanophthalma, L. dispersa- ireolata, Caloplaca paulii, Umbilicaria decussata, Staurothele elopima 1 ... 

Evernia mesomorpha, Lecanora stenotropa, Leptogium saturninum, Parmelia omphalodes, Ramalina terebrata, Umbilicaria decussata, Usnea antarctica 687)... 

Umbilicaria aprina (Nyl.), Umbilicaria cylindrical, Umbilicaria decussata (ViII.)... 

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