Native to (or naturalized in) Oregon:
- Deciduous tree, to about 30 ft (9 m) tall in cultivation, nearly 50 ft (15 m) in the wild., rounded habit, branches upright, then arching and spreading. Leaves alternate, pinnately compound, 20-30 cm long, odd number of leaflets (7, 9, or 11), each elliptic to oblong-ovate, 5-8 cm long, rounded at base, tip acute, margin entire, upper surface grayish green when unfolding, later a dark, almost olive green, paler below. Flowers white with greenish yellow, about 1 cm long, in erect, stiff clusters 10-15 cm long. Fruit (pod), flat, 3.5-6 cm long and about 1 cm wide.
- Sun or partial shade.
- Hardy to USDA Zone 4 Native to Manchuria.
- amurensis: of the Amur Region, northeast Asia, mainly Russia and China
- Corvallis: Sunset Meadows Arboretum, along Country Club Drive east of 53rd St., Tree # 52.