Osteospermum clandestinum is an aromatic annual herb that grows to 40 cm in height. The stems and leaves are covered in gland-tipped hairs. The grey-green leaf is lanceolate with spaced teeth, upturned margins and slight recurving along its length.
Branched clusters of daisy-shaped flowerheads are produced from midwinter to early spring. They have yellow rays, sometimes with brown colouring at the petal bases, as seen in the photo. The disc flowers are dark purple or yellow, depending on the flowering stage.
The distribution of the species lies from southern Namibia to the south-western Cape (Manning, 2007).