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DescriptionDeciduous shrub or small to medium-sized tree. Branchlets often spine-tipped. Leaves typically as broad as they are long, with 6-10 pairs of pinnae; leaflets in up 20 pairs per pinna, oblong, bluish to blue-green; petiole with a gland about midway. Flowers in fluffy, semi-spherical heads, creamy-white. Pods up to 27 cm long, usually hairless brown, indehiscent.