Trees, usually over 10 m tall. Branches with soft thorns when young. Leaves odd-pinnate, 50-90 cm, with petiole violet-red and spiny; leaflets 8-17 pairs, opposite or nearly so; blades lanceolate-oblong, 9-15(-20) × 3-5 cm, abaxially gray-green, pilose, adaxially glabrous or puberulent except for veins which are pubescent, base broadly cuneate or somewhat rounded, each side 2-4-dentate, teeth abaxially glandular. Panicles ca. 30 cm. Samarium ca. 5 cm.