This plant is an annual herb growing up to tall. The leaves are opposite, or toward the top of the plant, alternately arranged. The leaves are lance-shaped to oval and up to long. They may be smooth-edged or serrated. Flowers occur singly in the leaf axils. They are pink to purple in color, sometimes white, and somewhat bell-shaped. They measure up to long. The fruit is a capsule up to long which contains seeds roughly long. This plant grows wild in
savanna and other habitat types. It is also a weed of fields and homesteads. It can grow on poor, rocky soils and it flowers even through
drought conditions. When cultivated the plant yields of leaves per
hectare. This plant is vulnerable to the leaf spot disease
Cercospora sesami. It is also attacked by hawk moths (
Sphingidae), the moth
Antigastra catalaunalis, and the vegetable bug
Nezara viridula. ==References==