Chascanum cernuum is a perennial herb of the south coast from the Cape Peninsula to KwaZulu-Natal as well as the Little Karoo. The habitat covers sandstone fynbos, karoid scrub and rocky flats. The plant branches and grows erect stems to heights from 30 cm to 60 cm in height.
The flowers are white, sometimes tinged with pink or mauve. There is a green five-pointed calyx at the base of the long flower tube. The spreading and wavy corolla lobes broaden into two rounded segments at their tips. Two unequal pairs of stamens are hidden inside the tube. Flowering may happen almost throughout the year. The leaves are oblong or obovate and leathery; toothed at the tips (Bond and Goldblatt, 1984; www.plantzafrica.com).