Tree 5-18 meters high, with pendulous branches, with short, sharp stipular spines. The leaves are evenly 2-pinnate, 4 to 8 cm long. The flowers are white, in dense heads, 1 cm in diameter. Pods are turgid, twisted, and spiral, 10 to 18 cm long, 1 cm wide, and dehiscent along the lower suture. Seeds are 6-8, with an edible, whitish, pulpy aril. The arillus is sweet when the fruit is ripe.