The Russian wild olive, as the name indicates, is a native of Russia found growing under natural conditions in southern Europe and western Asia. It has been planted to a considerable extent in China.
Scott, Chas A.
"The Russian Wild Olive,"
Ames Forester: Vol. 1
, Article 8.
Available at: https://lib.dr.iastate.edu/amesforester/vol1/iss1/8