Although their distribution areas overlap, the two subspecies are ecologically separated. Sometimes the two subspecies grow in close proximity but no intermeÂdiates or putative hybrids have been found.
Use
(b). subsp. phyllopodium Tolken in Bothalia 12: 380 (1978). Type: South West Africa/Namibia, Numais, Dinter 8092 (BOL, holo.!; WIND!).