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Pod straight or nearly so, oblong, woody, indehiscent, in section bluntly tetragonal or even subterete, internally septate between the seeds.
Leaves 2-pinnate, eglandular; pinnae each with several pairs of alternate or sometimes subopposite leaflets.
Stamens 10 (rarely and casually 12), fertile; anthers eglandular at the apex, even in bud.
Calyx gamosepalous, with 5 (rarely and casually 6) teeth.
Inflorescences of solitary or paired axillary racemes.
Petals 5 (rarely and casually 6), free.
Seeds hard, brown, unwinged.
Flowers hermaphrodite.
Unarmed tree.
