Melicope simplex is a shrub in the family Rutaceae that is native to New Zealand.

Melicope simplex, commonly known as poataniwha, is a shrub growing to 4 metres (13 ft) high. It has small, 1 to 2 centimetres (0.39 to 0.79 in) long serrated leaves, and produces white flowers followed by tiny black seeds.^[1]