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DescriptionTrees or shrubs, usually with stout, simple or branched, thorns. Leaves usually 2-pinnate on long shoots, 1-pinnate or 2-pinnate on short shoots. Leaflets often serrate. Flowers unisexual, in racemes or panicles, greenish. Bracteoles small or 0. Calyx campanulate with 3-5, subequal lobes. Petals 3-5, sessile, imbricate. Stamens 6-10. Anthers uniform. Pods ovate or elongated, straight, flattened, indehiscent or tardily dehiscent.