This species has a number of uncommon features, making it easy to recognise – once you know what to look for.
It is a small shrub up to 15 cm tall of which the short shoots are decked out with small spine-like projections and it has boat-shaped leaves to 1 cm long and 0.5 cm wide (those on upper shoots are more or less round). The leaves are covered with papillae which are more or less cobblestone-shaped, but much longer on the edges.
The flowers are solitary, pinkish-purple to almost white and to about 3 cm in diameter; they appear in July-September and are followed by fruits with 6 (instead of the usual 5) compartments.
The plants occur in deep soil usually covered with quartz pebbles, from Namaqualand to Clanwilliam.