Nemesia fruticans produces summer flowers that are often mauve, but may also be white or pink, with a prominent yellow hump or protuberance on the lower lip of each flower. The plant is a small shrub with erect stems from a woody base and a woody taproot. Although it is a perennial it is sometimes planted annually.
There are about seventy Nemesia species belonging to this genus. There is a big international trade in nemesias, mainly the enhanced flower cultivars produced horticulturally (www.plantzafrica.com).