Some species can be separated. Diospyros Ebony 475 Tropics. All species look alike. Some species can be separated. Euonymus Spindle Tree 177 North temperate.
All species look alike.
Fagus Beech 10 North temperate regions. All species look alike. Fraxinus Ash 65 North temperate regions to the tropics. All species look alike. Guaicum Lignum-vitae 6 Warm Americas.