Hamamelis n. : A genus of plants which includes the witch-hazel (Hamamelis Virginica), a preparation of which is used medicinally.

Example:
How to farm and process Hamamelis on a large scale?

Taxonomy
Hamamelis, Witch-hazel, flowers, free encyclopedia, Hamamelis mollis, Hamamelis virginiana, genus, Hamamelis japonica, trees, the leaves, leaves in autumn, family Hamamelidaceae, Garden shrubs, fruit, Witch, petals, the seeds, red flowers.

Defination from the web:
Hamamelis, pronounced /ˌhæməˈmiːlɪs/)[1]) is a genus of flowering plants in the family Hamamelidaceae, with two species in North ... The Persian Ironwood, a closely related tree formerly treated as Hamamelis persica, is now given a genus of its own, as Parrotia persica, as it ...