This member of the Crassulaceae family was given this name by Hellmut R. Toelken in 1978. It is found in southern Namibia, northern Namaqualand and Northern Cape in South Africa, growing in a well drained soil with some water and lots of sun. The caudex will grow up to ten centimetres in diameter, the whole plant up to 40 centimetres height. The flowers are yellow and green.
The genera name is an anagram of Cotyledon; a closely-related genus. The species name after Harry Hall,1906-1986, a British-born horticulturist, botanist and succulent plant authority. Almost green plant from Alexanderbaiil, South Africa. Oranje River, Namibia.

