Stone fruit refers to the iron tree fruit, belonging to the seeds of Yunnan thuja, a plant in the family of thuja, while the wind flow fruit, i.e., thick scaly Ko, is a family of crustaceans, the attribute of the plant.

Stone fruit is a round fruit, yellowish, morphology and the appearance of small stones, while the wind flow fruit up to 30 meters high, 30-40 cm in diameter at breast height, raw branches, petioles, leaf dorsal veins and inflorescence axis are branched stellate short hairs.