This is a crane-headed gourd. The lower part of the fruit of crane-headed gourd is irregular, highly spherical, with obvious ridges on the surface, irregular surface, dark black color and slender stalks on it. The whole gourd looks like a crane-headed gourd. When the fruit is ripe, the hard shell can be used to make containers and handicrafts, and can also be used as a back-pounding fitness object. Crane head gourd is named "Mace" because it looks like an ancient weapon mace.