Tectona grandis seeds are harvested in Feb. 柚木 you mu. Trees to 40 m tall. Branchlets gray to grayish brown, 4-angled, yellowish to grayish brown stellate tomentose. Petiole robust, 2-4 cm; leaf blade ovate-elliptic to ovate, 15-45(-70) X 8-23(-37) cm, papery, abaxially densely grayish brown to yellowish brown minutely stellate tomentose, adaxially scabrous and puberulent along veins, base cuneate and de-current, margin entire, apex acuminate to obtuse, veins 7-12 pairs. Panicles 25-40 X 30 cm. Flowers fragrant. Calyx tube 2.5-3 mm, with white stellate hairs. Corolla white; tube 2.5-3 mm, outside puberulent glandular; lobes ca. 2 mm, obtuse. Ovary strigose. Style 3-4 mm. Fruit globose, 1.2-1.8 cm in diam., minutely tomentose. Fl. Jun-Aug, fr. Sep-Dec.