Fast-growing ash, dicotyledon class, ash tree genus of Oleaceae. It is a deciduous tree with a height of 15m and a diameter at breast height of 40cm. It is distributed in the north-central and southern parts of northeast China, through the Yellow River Basin and the Yangtze River Basin, south to Guangdong and Guangxi, southeast to Fujian, and west to Gansu. Its beautiful tree shape and strong stress resistance make it one of the important afforestation tree species and landscaping tree species in saline-alkali land.

Fast-growing white wax is an excellent deciduous tree species. The adult tree crown is oval, the trunk and main branches are yellow-brown, and the branchlets of 1 to 2 years are smooth and hairless. Odd-pinnate compound leaves, 5-9 opposite leaflets, 7 under normal circumstances. The leaves are ovoid or ovate-lanceolate, with a length of 3-10cm, with lateral or terminal cones on the branches of the year. The inflorescence is relatively large and loose, and the inflorescence is drooping. It blooms in spring and summer, and the flowering period is 3 to May; the fruit matures in October.