Botanical illustration - coloured - Conophytum calculus (A.Berger) N.E.Br. subsp. calculus. Plate 32, Mesemb. Notes, Part 3, H.M.L. Bolus 1936-58. A. Drawn from a collection made 17 miles north of Van Rhynsdorp along the main road to Nieuwerust by N.S. Pillans (6037), January 1928.