Spark source mass spectrometry with electrical detection was used for the determination of trace element contents in the ash of 172 plants comprising 21 lichens. 42 mosses. 78 dwarf shrubs and 31 trees. The highest contents found in single samples were 2800 ppm U in one moss. https://www.spidertattooz.com/OPI-GelColor-The-Color-That-Keeps-On-Giving-0-5-oz-HPJ07-p22791/