Twining plant. Leaves ovate, sometimes narrow, to 5 cm long, 2.5 cm wide, softly silky-hairy, bases heart-shaped. Flowers solitary or in 2s (rarely 3s); spring to early summer. Sepals 4-5 mm long. Petals mostly 1.5-2 cm long, mostly tubular; bicoloured, green, grading to orange at the tips. Fruit a thin-walled capsule with 2 valves. Syn. Billardiera bignoniacea (f. Muell.) e.m. Benn.
Other attractive species occasionally offered include the stunning Western Australian Chapman River Bell Flower, M. ringens F. Muell., and M. candidus Endl., a coastal species that flowers repeatedly for nearly 3 months.
Source: (2002). Pittosporaceae. In: . Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.