It is a slender twiner with narrowly elliptic leaves and yellowish-green flowers arranged singly on thin, pendent peduncles.

The petals are spatula-shaped, yellowish-green and tinged or spotted with dark blue at the edges, 26–38 mm (1.0–1.5 in) long, the lobes spreading but not curved backwards.

Flowering occurs from October to February and the mature fruit is a shiny purple, oval berry 18–20 mm (0.71–0.79 in) long, containing many seeds.

[7] Most species of Billardiera are endemic to a restricted part of Australia, but B. macrantha, as presently circumscribed, has a relatively wide distribution.

It occurs on the Northern and Southern Tablelands of New South Wales and the Australian Capital Territory, on the Otways and mountain ranges east of Melbourne and isolated places further west, and in Tasmania.