Juglans californica shell that is difficult to remove. The Chumash Indians of the Channel Islands of California and Ventura County eat the nuts; however, they are not grown commercially for this purpose. "Juglans californica" is cultivated throughout California to support the walnut industry, used as a rootstock in English walnut orchards. It is also cultivated as an ornamental tree where it is planted in California native plant, xeriscape, and wildlife habitat gardens and natural landscaping in California, and in Hawaii. Some authorities (e.g. the California Native Plant Society) combine this species with "J. hindsii". On the other hand, a 2007 molecular analysis
Exocarpos latifolius fruit is a globular nut on a short stalk. As it ripens the stalk swells and turns red, like an inside out cherry. The fruit is 4–6 mm long and is inedible, though the stalk is, and was used as a traditional food source by Aboriginal Australians. The seed is found on the outside of the fruit, hence the name exocarpus, from the Latin meaning "outer". The wood is very fine-grained with little figure but often striking colour variation and was historically used for cabinet work. The tree was used for many purposes by Aboriginal Australians.The bark was used as