Melicope ternata aka Wharangi

Melicope ternata is an evergreen tree in the Rutaceae family. Its native range covers New Zealand and the Kermadec Islands. It grows in coastal and lowland forests, often along their edges. In New Zealand, its range reaches about 41°30′ south. It occurs on both the North and South Islands. Kew lists it as a tree of subtropical climates. It is not native to Britain or Ireland.

The tree reaches about 20 feet [6 metres] in height. It keeps its leaves through the year in suitable conditions. Bruised leaves give off a strong scent like oranges. This scent gives the tree value in a scented garden. Plants For A Future records flowering from September to October. The flowers have both male and female organs. The species is self-fertile, so it can set seed without another plant.

This tree needs shelter and soil that drains freely. Plants For A Future recommends sandy soil free of lime. It also lists loam as suitable for growth. The stated soil range runs from mildly acid to neutral. The tree prefers moist soil and accepts sun or partial shade. Protect it from hot winds that dry out its leaves. A sunny woodland edge is one suggested garden setting. A sheltered south-facing or west-facing wall is another option.

Cold limits its use outdoors in Britain. Plants For A Future lists USDA zones 9–11 and describes it as frost tender. Cold winters can strip the tree of its leaves. Outdoor growing suits only the warmest British sites, beside a sunny wall. In cooler places, the source recommends growing it in a pot. The pot can stand outside during summer. Move it into a conservatory for winter shelter. The source calls it easy to grow where conditions suit.

The tree yields an edible gum used for chewing. This gum has also been used to freshen the breath. Plants For A Future gives both food and medicinal uses low ratings. It reports no known hazards, but this does not establish pet safety. It also lists no weed potential. Seeds can be sown in a greenhouse in spring. Young plants need greenhouse shelter through at least their first winter. Plant them out after the last expected frost. Half-ripe cuttings offer another means of propagation in July or August.