Erect shrub to 2 m tall, sometimes twining. Leaves to about 5 cm long, toothed to almost entire, glossy. Flowers solitary, axillary. Calyx with 7-10 teeth. Petal tube to about 7 cm long, creamy yellow, with violet lobes; summer.

Tropical SW Africa

Source: Spencer, R. (2002). Acanthaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.