Chaetacanthus setiger is an evergreen perennial growing several stems from a woody rootstock to heights between 15 cm and 30 cm.
Its leaves, growing opposite on short stalks, are broadly ovate to rounded and soft-textured. The plant is hairy on leaves and stems, some hairs being stalks for glands.
The white flowers, two-lipped and tubular, grow from upper leaf axils. The upper lip is two-lobed, the lower one three-lobed, the lobes oblong and somewhat truncate, shorter than the tube. The stamens and style are slightly exserted. Flowers appear from late winter through summer.
This photo was taken in January at Damhoek on a southern slope of the Magaliesberg. The species distribution is in Gauteng, Mpumalanga and KwaZulu-Natal (Van Wyk and Malan, 1997; Leistner (Ed.), 2000; iSpot).