Description: Zanthoxylum Rhetsa is a type of deciduous tree with an expanded crown rising up to 35 meters long. The tree has a somewhat long bole that can be a maximum of 75cm in diameter. The plant is rarely grown in Vietnam. The bark is been used as a spice. It has a lime-pepper taste and is added to foods for seasoning or cooked in syrup with spices and further made into a relish.