Plants are small and mat forming, with clusters measuring between 50 and 80 millimetres (2.0 and 3.1 in) in diameter, though old plants may sometimes reach 150 millimetres (5.9 in). Bodies are obconical in shape, papillate, and greyish green to deep green in colour. Flowers appear in late autumn, and are nocturnal, strongly scented and off-white to yellow in color.
Conophytum stephanii grows in Namaqualand, South Africa, mainly between the towns of Steinkopf and Port Nolloth. Two subspecies are currently recognized: ssp. stephanii and ssp. helmutii.
Wagner G. 2002 Conophytum chauviniae (Schwantes) S.A. Hammer: rediscovery of the type locality? Mesemb. Stud. Group Bull. 17. (2): 26-28 (2002) - col. illus. En Geog=5 Systematics: ANGIOSPERMAE (AIZOACEAE: CONOPHYTUM) (, 200201723). ↩
Rawe R. 1975 The genus Conophytum section Costata Schwantes amended Tischer subsection Verrucosa Schwantes amended Tischer. Cact. Succ. J. (USA) 47. (3): 126-132 (1975) Illustrations, dot map. Geog=5 Systematics: ANGIOSPERMAE (AIZOACEAE: CONOPHYTUM) (, 197500690). ↩