Ebony Diospyros 475 Tropics. All species look alike. Elder Sambucus 20 Temperate and subtropical. All species look alike. Elm Ulmus 18 North temperate regions to northern Mexico.
All species look alike.
Some species can be separated. Species from Europe and western North America can sometimes be separated from the rest. Both genera and all species look alike. Fustet Cotinus 3 Southeast Asia, southern Europe to China. All species look alike.