Ulmus davidiana

Ulmus davidiana, also known as the David elm, or Father David elm (named after the botanist Armand David, who collected specimens), is a small deciduous tree widely distributed across China, Mongolia, Korea, Siberia, and Japan, where it is found in wetlands along streams at elevations of 2000–2300 m (6,500–7,500 ft). The tree was first described in 1873 from the hills north of Beijing, China. The tree suffered confusion with Ulmus uyematsui, a Taiwanese species widely planted in China, at the Morton Arboretum....read more on Wikipedia.