Selago corymbosa, the bitterblombos in Afrikaans, is a perennial shrublet that branches and grows to 60 cm tall. It belongs to the Scrophulariaceae, the sutera or figwort family.
Leaves are light green, about 4 mm long, narrowly linear with their edges rolled under. The leaves are clustered in the stem axils. The flowers are small and white on short spikes clustered in terminal corymbs of up to 6 cm in diameter. The calyx is five-toothed. The flowering time is December to June. It grows in the southern parts of the Western and Eastern Cape on fynbos slopes, but also in parts of the Karoo and in Kwazulu-Natal. It is said to be unpalatable to livestock (Bond and Goldblatt, 1984; Gledhill, 1981 and http://plantnet.rbgsyd.nsw.gov.au).