Native to (or naturalized in) Oregon:
- Broadleaf deciduous tree to 70-90(120) ft [21-27(37) m] tall, straight trunk, often free of lower branches with a narrow crown, but may divide near the ground in an open location and have a spreading habit. Bark is dark gray, separating into long plates which are free at the lower end or both ends, giving a shaggy appearance. Leaves alternate, pinnately compound, 20-35 cm, 5 leaflets, sometimes 7, 10-15 cm long, leaflet widest in the middle, elliptic to oblong-lanceolate, tip acuminate, margin finely toothed, with several tufts of hairs per tooth, deep yellow-green, paler and sparsely hairy below; fall color is yellow and golden brown. Fruit almost globular, 3-6 cm long, wider than long, solitary or in pairs, husk thick and woody, splitting freely to the base when ripe, nut light colored, slightly flattened and usually 4-angled, has a thin shell, kernel sweet and edible.
- Hardy to USDA Zone 4 Native range from Quebec to Minnesota and south to Georgia and Texas.
- ovata: ovate, egg-shaped, the fruit.