Vitex negundo is a shrub, which grows in the south of the Yangtze River in China and reaches the Huaihe River in Qinling Mountains in the north. East Africa passes through Madagascar, Southeast Asia and Bolivia in South America.
Vitex negundo, deciduous shrub or small tree, up to 6 meters high, with fragrant branches and leaves. The new branches are square, grayish white and densely covered with fine hairs. Leaves opposite; Palmately compound leaves, stipe, usually 5, sometimes 3; The lobules are ovoid, ovoid, 4 ~ 9 cm long and 1.5 ~ 3.5 cm wide, with the largest in the middle, decreasing on both sides in turn, with a long tip, a wedge-shaped base, full or shallow waves, or 2 ~ 5 shallow serrations on each side, with light green tips and sparse short hairs and fine oil spots. White below, densely covered with white fluff. Panicle, terminal; Calyx campanulate, 5-toothed; Corolla lavender, lip-shaped, about 6 mm long, upper lip 2-cleft, lower lip 3-cleft; Stamens 4, 2 strong; Ovary 4-loculed, style linear, stigma 2-lobed. Drupe, ovoid, brown, about 2.5 mm in diameter, surrounded by persistent calyx at the lower part. The flowering period is July-August. The fruiting period is August-September. Born in Xiangyang Mountain.