Marianthus bignoniaceus, commonly known as orange bell-creeper,[2] is a species of flowering plant in the family Pittosporaceae and is endemic to Victoria.

Marianthus bignoniaceus is a slender twiner with reddish brown stems that are silky-hairy at first, but become glabrous as they age.

The flowers are borne singly or in pairs on a slender, pendent pedicel 3–7 mm (0.12–0.28 in) long, the sepals lance-shaped and joined at the base, 2–6 mm (0.079–0.236 in) long and covered with shaggy hairs.

[2][3][4] Marianthus bignoniaceus was first formally described in 1854 by Ferdinand von Mueller in Transactions of the Philosophical Society of Victoria.

[7] This climber grows in moist forest and dense scrubs near streams, sometimes between rocks in higher places and is found in the Grampians National Park and nearby Black Range in Victoria.