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Genus Dictamnus
- a dicotyledonous genus of the family Rutaceae
Genus Fortunella
- small genus of shrubs native to south China producing small ovoid fruits resembling oranges: includes kumquats
Genus Phellodendron
- small genus of aromatic deciduous trees of east Asia often having thick corky bark
Genus Poncirus
- 1 species: trifoliate orange
Genus Zanthoxylum
- deciduous or evergreen trees or shrubs: prickly ash
Genus Simarouba
- type genus of Simaroubaceae; tropical American trees and shrubs having a pale soft wood and bitter bark
Genus Ailanthus
- small genus of east Asian and Chinese trees with odd-pinnate leaves and long twisted samaras
Genus Kirkia
- small genus of tropical South African trees and shrubs
Genus Picrasma
- small genus of deciduous trees of tropical America and Asia