Fig. 4: The 137Cs content of native vegetation (foliage) in the eastern U.S. using plant archives and more recent collections.
From: Bomb 137Cs in modern honey reveals a regional soil control on pollutant cycling by plants

Each symbol represents a single plant, and the species and state are given in the legend. The dashed red lines Zm and Pr indicates the level of radiocesium in plant diets above which dose-dependent abnormalities and mortality have been observed in the pollinators Zizeeria maha14 and Pieris rapae48, respectively.