The terebinth is a
deciduous flowering plant belonging to the
cashew family,
Anacardiaceae; a small
tree or large
shrub, it grows to tall. The
leaves are compound, long, odd pinnate with five to eleven opposite glossy oval leaflets, the leaflets long and broad. The
flowers are reddish-purple, appearing with the new leaves in early spring. The
fruit consists of small, globular
drupes long, red to black when ripe. All parts of the plant have a strong
resinous smell. The terebinth is a
dioecious tree, i.e. it exists as male and female specimens. For a viable population both sexes must be present. The oblong
leaf is bright green, leathery, with long or more with three to nine leaflets. Leaves alternate, leathery and compound paripinnate (no terminal leaflet) with three or six deep green leaflets. They are generally larger and rounder than the leaves of the
mastic, reminiscent of the leaves of
carob tree. The flowers range from purple to green, the fruit is the size of a
pea and turns from red to brown, depending on the degree of maturation. The whole plant emits a strong smell: bitter, resinous, or medicinal. In the vegetative period they develop "galls" shaped like a goat's horn (from which the plant gets the name "cornicabra", the common name in Spanish), that occur on the leaves and leaflets which have been bitten by insects. The species propagates by seeds and shoots. Although marred by the presence of galls, it is a very strong and resistant tree which survives in degraded areas where other species have been eliminated.
Pistacia terebinthus is related to
Pistacia lentiscus, with which it hybridizes frequently in contact zones.
Pistacia terebinthus is more abundant in the mountains and inland and the mastic is usually found more frequently in areas where the Mediterranean influence of the sea moderates the climate. The mastic tree does not reach the size of the
Pistacia terebinthus, but the hybrids are very difficult to distinguish. The mastic has winged stalks to its leaflets, i.e., the stalks are flattened and with side fins, whereas these stems in
Pistacia terebinthus are simple. On the west coast of the Mediterranean,
Canary Islands and
Middle East,
P. terebinthus can be confused with
P. atlantica. ==Habitat==