Muehlenbeckia axillaris

Muehlenbeckia axillaris (creeping wire vine, sprawling wire vine, matted lignum) is a low evergreen shrub, forming wiry mats up to about 1 metre (3 ft 3 in) in diameter, native to New Zealand, and the Australian states of Tasmania, New South Wales and Victoria.

[1] It has thin, red-brown stems, with glossy squarish to roundish leaves that are less than 1 cm (0.39 in) in diameter and 2–4 mm (0.079–0.157 in) thick.

The fruit is black, shiny, and up to 3.5 mm (0.14 in) long, produced in late summer to fall.

The plant is hardy, drought-tolerant, and quick-growing, thriving in a range of light conditions.

[2] Both Stephan Endlicher (in 1848)[3] and Wilhelm Gerhard Walpers (in 1849)[4] later referred to it as just Muehlenbeckia axillaris.

Muehlenbeckia axillaris fruiting. Multiple stages of ripeness can be seen.
Fruiting in Arthur's Pass National Park . Multiple stages of fruit development and even a couple of flowers can be seen in this image.