The Cronquist system placed the order in the subclass Hamamelidae, as comprising the families Juglandaceae and Rhoipteleaceae, the latter consisting of only a single species.
2.
They are commonly called " walnut " despite not being related to the Northern Hemisphere walnuts ( " Juglans " spp . ) which are in the family Juglandaceae.
3.
""'Engelhardia " "'is a genus of seven species of trees in the family Juglandaceae, native to southeast Asia from northern India east to Taiwan, Indonesia and the Philippines.
4.
""'Oreomunnea " "'is a genus of two species of flowering plants in the family Juglandaceae, native to southern Mexico and Central America, where they occur in montane rainforest.
5.
""'Oreomunnea mexicana " "'is a species of plant in the family Juglandaceae, which grows in the tropical rain forests of Mexico, Guatemala, Nicaragua, Costa Rica, and Panama at altitudes from 1 1.7 km.
6.
In biological classification, "'family "'(, plural " " ) is one of the eight major taxonomic ranks; it is classified between vernacular usage, a family may be named after one of its common members; for example, walnuts and hickory trees belong to the family Juglandaceae, commonly known as the walnut family.
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