It was found that during the period of observation at hospitals forestry radiation monitoring in fresh upland oak forests and wet Pinetum compositum main drive radiocaesium is oak, which is connected, apparently, with its biological and ecological features. It is also clear that, along with the biological specificity of a particular tree species, an important role in the accumulation of woody plants play a cesium type of forest growth conditions (trophicity, humidity). In woody plants most contaminated surface tissues that make up the crust. Further, the degree of contamination, followed by leaves (needles), small branches, wood with bark and wood peeled, where radiocaesium virtually identified.