NNT maps of Europe

  
  
Silver wattle
Acacia dealbata
Grand fir
Abies grandis
Box elder
Acer negundo
Green ash
Fraxinus pennsylvanica
East. American black walnut
Juglans nigra
Lodgepole pine
Pinus contorta
Douglas fir
Pseudotsuga menziesii
Blue spruce
Picea pungens
Radiata pine
Pinus radiata
Black cherry
Prunus serotina
Sitka spruce
Picea sitchensis
Weymouth pine
Pinus strobus
Northern red oak
Quercus rubra
Black locust
Robinia pseudoacacia
Western redcedar
Thuja plicata