Are Stachyurus and Corylopsis both native to eastern Asia?
Stachyurus Stachyurus is the only genus in the flowering plant family Stachyuraceae, native to the Himalayas and eastern Asia. They are deciduous shrubs or small trees with pendent racemes of 4-petalled flowers which appear on the bare branches before the leaves. The plants have leaves with serrate margins. Stachyuraceae contains a single genus with eight species.
Sargassum miyabei Sargassum miyabei is a species of seaweed native to East Asia and Southeast Asia, from eastern Russia and Japan to Vietnam and the Philippines. It belongs to the subgenus "Bactrophycus", section "Teretia" of the genus "Sargassum".