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Oleaceae family

Ligustrum japonicum
Thunberg
, Nov. Acta Regiae Soc. Sci. Upsal. 3:  207.  1780.

Naturalized rare shrub of lower montane rainforest, La Porte as far as the hut, Quilesse Forest, close to trail and small gullies.
Native to eastern temperate Asia (Taiwan, Korea, Japan).
Presumably introduced at one time by Department of Forestry?
If so a very risky venture. The spread of this shrub should be monitored for signs of becoming invasive.
Ligustrum robustum, a relative, is on the "100 of the World's Worst Invasive Alien Species" list
.