walnut genus

Family: Juglandaceae

Species
1. Juglans ailantifolia (Japanese)
2. Juglans cathayensis (Chinese)
3. Juglans cinerea (butternut)
4. Juglans cinerea x ailantifolia (buartnut)
5. Juglans major (Arizona)
6. Juglans mandshurica (Manchurian)
7. Juglans nigra (black)
8. Juglans regia (English)

Photos from species in Juglans.