A juniper is a small bush that can only be grown in mountainous areas.
It grows very slowly (say 5x the time of normal trees), and gives no logs when chopped.
It (slowly) turns neighbouring mountain tiles into pine forest tiles (like other trees do).
It can be harvested for berries, boughs and branches.
The berries can be dried and used to season meat dishes, beers and liquors. (We'd call for quininated tonic waters in the next update)
The boughs can be used to smoke fatty fishes.