(1)monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis)
(2)雌雄同株の木と低木（カバノキ属、ハンノキ属、クマシデ属、ハシバミ属、アサダ属とオストリオポシス属を含む）