Shrub to about 1.5 m tall. Leaves to 30 cm long, oblong-ovate, large, glossy, with sunken white to yellow veins, long-pointed. Flowers in spikes, each flower to 5 cm long with bright red bracts and yellow petals. [S. nobilis hort.]
Source: (2002). Acanthaceae. In: . 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.