Latin digitus — finger, referring to the shape of the flower.
Biennial and perennial herbs, occasionally small shrubs. Leaves simple, alternate, sometimes mostly in a basal cluster. Flower clusters mostly terminal and often 1-sided with bracts. Calyx of 5 equal lobes, shorter than the tube. Corolla 4-lobed, with a cylindrical or inflated tube that is often constricted at the base, 2-lipped, the upper lip shorter than the lower. Stamens 4. Fruit a capsule.
Grown as border plants for the spires of attractively coloured, tubular flowers.
Seed, occasionally by division.
Leaves alternate; stamens 4; calyx cut nearly to the base; corolla 2-lipped.
About 20 species from C Asia to NW Africa and Europe.
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.