This is one of two native California walnuts. It forms a tall, slender tree, more open and less broad than the commonly cultivated English Walnut (Juglans regia, see below). Like all walnuts, it is deciduous. The leaves are pinnate, with 11–21 leaflets 7–13 cm long, narrowly triangular to lanceolate. This is easily distinguished from English Walnut by the overall shape, and the greater number of leaflets. The fruits are less valuable than English Walnuts, since they have much thicker shells and less meat. However, the tree is much more resistant to drought and pests. English Walnuts are commonly found grafted on to Northern California Walnut rootstock. The bark of the two trees is quite different, Northern California Walnut having darker bark with narrower striations.