Greek dis — two, askos — sac, referring to the 2 yellow and maroon patches on the corolla that are known as windows.
Erect or spreading annual and perennial herbs. Leaves elliptic to ovate, toothed, often glandular-hairy with prominent veins. Flower clusters terminal. Flowers with lateral spurs, petals with 'windows', yellow with maroon marking.
Often grown as bedding plants for the colourful flowers.
Seed.
Twin spurs at the back of the flower looking like baggy pants, containing black glands.
About 50 species from S Africa.
Benham (1987).
Source: (2002). Scrophulariaceae. 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.