mertensiana
Mertensiana refers to a genus of small, often deciduous or semi-evergreen trees and shrubs in the family Oleaceae, the olive family. These plants are native to temperate regions of Asia, with a distribution primarily in China, Korea, and Japan. Mertensiana species are typically characterized by their opposite, simple leaves, which are often ovate to lanceolate in shape. The flowers are usually borne in panicles or cymes and are generally small and inconspicuous, often appearing in spring or early summer. The fruits are typically small, drupaceous berries.
The genus Mertensiana is closely related to other genera within Oleaceae, such as Fraxinus (ash) and Ligustrum