| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Juglandaceae | Juglans ×bixbyi | Bixby's Walnot, Buartnut | Tree lines, thickets, early successional forests. | This taxon is a hybrid of a North American and an Asian species. |  (c) Goldman, Douglas - CC-BY-SA |
| Juglandaceae | Juglans ailantifolia | Japanese Walnut | Suburban woodlands. | Native of Japan. |  (c) Dove, Oscar - CC-BY |
| Juglandaceae | Juglans cinerea | Butternut, White Walnut | Moist, nutrient-rich forests. | NB west to MN, south to n. GA and AR. |  (c) Aaron, Nathan - CC-BY |
| Juglandaceae | Juglans major var. major | Arizona Walnut | In riparian areas along streams. | Ec. and nc. TX west to sw. UT and n. AZ, south to Mexico (CHH, DUR, SIN, and SON). |  (c) Tidwell, Michael - CC-BY |
| Juglandaceae | Juglans microcarpa var. microcarpa | Little Walnut | Limestone outcrops, in riparian areas along streams. | Sc. KS and nc. NM south through ec. TX and s. AZ to Mexico (CHH, COA, NLE). |  © Rich Reaves |
| Juglandaceae | Juglans nigra | Black Walnut | Moist, nutrient-rich forests of floodplains and slopes, calcareous hammocks. | MA west to MN, south to Panhandle FL and TX. | |
| Juglandaceae | Juglans regia | English Walnut | Waif from ornamental use. | Native of eastern Europe west to c. Asia. |  (c) Buczkiewicz, Daniel - CC-BY-SA |