Description from Flora of China
Trachylobium verrucosum (Gaertner) Oliver.
Trees, 6-24 m tall. Branchlets grayish white. Petiolules ca. 3 mm; leaflets ovate-oblong, asymmetric, 5-8(-12) × 2.5-5 cm, both surfaces glabrous, base obliquely rounded, apex acute. Inflorescences panicles; bracts and bracteoles deciduous, ovate or orbicular. Flowers small. Calyx tube expanded and turbinate in upper part; lobes 7-11 mm, outside densely adpressed puberulent, inside densely white silky. Petals unequal in size, uppermost inner 3 larger, suborbicular, clawed, other 2 small, scaly, or sometimes 5 subequal and all clawed. Ovary shortly stalked, densely strigose at base. Legume blackish brown, slightly compressed, obovoid, 3-4.2 cm, tuberculate. Fl. Sep-Nov, fr. next May-Jun.
Cultivated. Taiwan [native to Madagascar; cultivated in Indonesia (Java), Pacific islands (Hawaii), Singapore, and Sri Lanka].