Genus Pterocarya is a type of tree that belongs to the walnut family, Juglandaceae. There are four species of Pterocarya found worldwide and each species bears different names in different regions. For instance, Pterocarya fraxinifolia is called Caucasus Wingnut, Persian Walnut, or Turkish Hazel, while Pterocarya rhoifolia is known as Chinese Wingnut or Sichuan Wingnut. Further, Pterocarya stenoptera is referred to as Himalayan Wingnut or Chinese-wingnut-midi and lastly, Pterocarya tonkinensis is also called Tonkin or Vietnamese pterocarya. Although these species are generally recognized by their scientific name Genus Pterocarya, the common names given to them provide an additional identity that is easier to remember and understand.