Littonia modesta Hook.

Perennial erect, trailing or climbing herb from a stout rhizome-like corm. Stems to 1.2 m, flowers solitary in leaf axils. Leaves broadly tapered, with apical tendrils. Flowers solitary, not widely spreading, to 5 cm wide; summer. Tepals bright yellow-orange.

S Africa.

Source: Conran, J. (2005). Colchicaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.