THE SOUTHWESTERN WALNUT.
Juglans rupestris, Engelm.
The walnut of the Southwest grows into a spreading, lux uriant tree, where its roots find water. But on the canyon sides, and higher on mountain slopes, it becomes a stunted shrub, because of lack of moisture.
The nut is smaller than that of the eastern walnuts and has a thick shell, but the kernel is sweet and keeps its rich flavor for a long time. The Mexicans and Indians are glad to have this nut added to the stores they gather for their winter food.
One striking feature of this tree is the pale, cottony down on its twigs, which sometimes persists three or four years. The long limbs droop at the extremities, almost deserving to be called "weeping." But nothing could be more cheerful in color than the yellow-green foliage, shining in the sun, against the white bark of the tree. In autumn the foliage turns bright yellow. A speci men, much admired, grows in the Arnold Arboretum in Boston.