Vervain belongs to the perennial herbaceous plants, its stem is erect dark green, the leaf blade is long ovate, the base is cherry-shaped, the flowering period in July, the fruit period in September. Verbena is mainly distributed in Jiangsu, Hubei, Guangxi, Guizhou and other places, commonly found on mountain slopes and wasteland, preferring warm climate, not cold, the soil requirements are not high, good drainage can be.