Fig. 6

True species assignments in the first row; assignment achieved by the system in the second. Morphologic similarities (especially between Acer plantanoides, Acer pseudoplantanus, Populus tremula, Populus nigra, Quercus cerris, Quercus robus, Quercus petraea, Ulmus glabra, and Ulmus minor) and damaged leaves caused misclassifications