Leaflets 8-17, oblong, to 5 cm long. Flowers to 5 cm long, yellow with a distinctive orange colouration. [T. alata DC.]
Lord and Willis, in Shrubs and Trees for Australian Gardens (1982), state that this hybrid originated in Victoria in the 19th century but that the exact origin and hybrid parents are not certain; they are sometimes listed as T. arequipensis × T. stans. This plant is also known to be cultivated in New Zealand and Singapore.
Source: (2002). Bignoniaceae. 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.