Family RestionaceaeCalopsis paniculata is a tall reed like plant with bright green leaves and stems reaching a height of 3m. It bears clusters of brown grass-like flowers at the terminal ends of the stems. The male and female parts are borne on separate plants, with the female plants bearing small snowy white inflorescences and the male plants bearing less showy inflorescences. The stems arise out of the ground from a strong underground rhizome with the lower parts of the stem looking somewhat bamboo-like.
As is the case with most restios, calopsis is wind pollinated, relying on the wind to carry the pollen from the male to the female plant. It is therefore necessary to plant several specimens reasonably close together if you wish to harvest seed.
Calopsis is often used for the making of brooms in the Eastern Cape province as it has shorter branches and more wiry stems than many of the other Cape reeds, which are more often used for thatching.