Q: I find the different names for walnut quite puzzling. Two seemingly identical pieces of wood are called English or French walnut. But what is the difference between Claro and Bastogne?
— Nigel Bowman
A: English, French and other European walnuts are members of the species Juglans regia. The location provides the country’s designation, although most European walnut now comes from Turkiye.
American black walnut (Juglans nigra) comes largely from the Missouri River valley.
Claro or California walnut (Juglans californica) comes from the Golden State, as does another species often marketed as Claro, Juglans hindsii, or Hinds walnut.
When Hinds walnut and Juglans regia are cross-pollinated, the result is Bastogne walnut.