English name: Gutta-percha tree Leaf Also known as: Gutta-percha tree When the bark and branches of the tree are broken or the leaves are torn off, a white milky juice comes out. This emulsion is called gutta percha and is used as a natural rubber. Du Zhong is known as a natural rubber producing tree that grows even in cold regions. Gutta-percha Tree Leaf, Cut Botanical Name: Eucommia ulmoides Family: Lycaenidae Part: Leaf Also known as: Gutta Percha Tree Country of origin: China *The country of origin is subject to change without notice due to climate and other factors.