Myoporum laetum, commonly known as ngaio /ˈnaɪ.oʊ/ or mousehole tree is a plant in the family Scrophulariaceae endemic to New Zealand, including the Chatham Islands. It is a fast growing shrub, readily distinguished from others in the genus by the transparent dots in the leaves which are visible when held to a light.
Ngaio is a fast-growing evergreen shrub or small tree which sometimes grows to a height of 10 metres with a trunk up to 0.3 metres in diameter, or spreads to as much as 4 metres. It often appears dome-shaped at first but as it gets older, distorts as branches break off. The bark on older specimens is thick, corky and furrowed.
The flowers are white with purple spots and are borne in groups of 2 to 6 on stalks 7–15 mm long. Flowering occurs from mid-spring to mid-summer and is followed by the fruit which is a bright red drupe 6–9 mm long.