Hexasepalum teres is a species of flowering plant in the coffee family known by the common names poorjoe and rough buttonweed.

[1] The species is also naturalized in the Netherlands, the Canary Islands, Western Africa, Angola, China, Japan and Korea,[2] India, and Madagascar.

[3] Hexasepalum teres has a thin, erect or prostrate stem rarely up to 65 cm (26 in) in height.

It has opposite leaves which are stiff, dark green, elliptical, pointed, and roughly-textured, up to 3 cm (1.2 in) long.

The fruit is ellipsoid, splitting into two nutlets This plant is most common in sandy areas such as desert dunes and river floodplains.