Corylus heterophylla
Corylus heterophylla, the Asian hazel, is a species of hazel native to eastern Asia in northern and central China, Korea, Japan, and southeastern Siberia.
Description
It is a deciduous shrub or small tree growing to tall, with stems up to thick grey bark. The leaves are rounded, long and broad, with a coarsely double-serrated to somewhat lobed margin and an often truncated apex. The flowers are wind-pollinated catkins; the male catkins are pale yellow, long, while the female catkins are bright red and only long. The fruit is a nut produced in clusters of 2–6 together; each nut is diameter, partly enclosed in a long, bract-like involucre.It is very similar to the closely related common hazel of Europe and western Asia, differing in the leaves being somewhat more lobed.