NW Argentina to Bolivia in humid forests. Very similar in appearance to the Black walnut of the USA, and may have been moved by migrating indigenous people as a food and trade item along the mountains over a very long period. Suited to the mild parts of NZ.

E USA. Broadly spreading, deciduous. Best in sheltered fertile site. Rough green fruit husk and rough thick shelled nut. Grown primarily for timber; very durable, rich dark brown, used for cabinets, gunstocks and boat building.

A tall straight trunked deciduous tree with timber potential. Vigorous growth continued into the late autumn, indicating it needs a mild climate. A well drained soil is necessary. Edible nuts similar to J. regia.

Narrowly conical when young, evergreen. Masses of very small white flowers Dec/Jan, worked by bees. Tolerates exposed, cold and low fertility sites. Useful nurse tree for native revegetation projects.