Kingdom: Plantae
Division: Magnoliophyta
Class: Eudicots
Subclass: Rosidae
(Unranked): Eurosids 
Order: Sapindales
Family: Rutaceae
Subfamily: Toddalioideae
Genus: Melicope
Species: Melicope ternata
Common name: Wharangi.

A New Zealand round coastal shrub was once known for its edible gum. Melicope ternata yields an edible gum that was used for chewing as it sweetens the breath for halitosis sufferers. It is growing in the coastal forests of New Zealand. It has aromatic lime green glossy trifoliate leaves. Two species of Melicope are the only members of the citrus family to be present in New Zealand. As with other members of this family, both Wharangi (Melicope ternata) and Poataniwha (Melicope simplex) emit a pleasant scent (from oil glands) when the leaves are crushed.
Small yellowish green scented flowers develop in early spring followed by brown capsules each with 4 small pods containing one black shiny seed from late spring to late summer. These are eaten by birds. 
This shrub is slightly frost tender and grows to about 5m in height. 

Melicope ternata Wharangi. -2.JPG

1-Melicope ternata Wharangi-007.JPG

Bright green young leaves with the darker mature leaves below.
Melicope ternata.JPG  

1-Melicope ternata Wharangi-003.JPG  

The top surface of a leaf. The centre leaf has a longer stalk than the side ones.
1-Melicope ternata Wharangi-002.JPG

The underside of a leaf covered with oil glands. Click to enlarge.
1-Melicope ternata Wharangi-010.JPG

The tiny flowers of Melicope ternata (Photo August)
Melicope ternata Wharangi. -1.JPG

Green seed cases December.
Green seed capsules Melicope ternata .JPG

Last years seeds (Photo August)
1-Melicope ternata Wharangi-006.JPG

Melicope ternata Wharangi. -3.JPG 

The trunk
1-Melicope ternata Wharangi-005.JPG

Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/