This genus consists of a single species of small, deciduous tree indigenous to China. It features green leaves that produce latex, along with small, subtle green flowers and winged fruits. The tree is commonly grown in China due to the medicinal benefits associated with its bark.

Eucommia

Eucommia ulmoides is a robust, deciduous tree that can reach heights of over 15 meters, developing a wide, rounded canopy. Its leaves are thick and glossy, measuring up to 15 centimeters in length, with an oval to elliptical shape and serrated edges. When the leaves are gently torn, they release a rubbery substance. In spring, the tree produces subtle greenish-brown flowers, which may be succeeded by flattened, elliptical, winged fruits on female specimens, reaching lengths of up to 3.5 centimeters.