Appearance: Large deciduous shrub or small tree, up to 25' tall. Spreading branches form into a dense rounded crown. Thin bark comes off in narrow, elongate, fibrous strips. Twigs are very flexible and bear a terminal spine.
Leaves: Alternate, distinctive silver-gray lance shaped.
Flowers: Yellow spicy-fragrant flowers are borne either individually or in small clusters in the leaf axils, blooming in late spring.
Fruit: Dry, olive-like, hard; seeds remain viable in the soil for three years.
Roots: Deep taproot, is capable of fixing nitrogen in the soil.