Conophytum herreanthus (Umdaus)
The typical subspecies shown here, was only known from the single locality at Umdaus where nobody has now seen it for a number of years. It could be extinct in the wild and that was probably a result of people collecting the plants. The species only has a small degree of fusion of the leaves, much smaller than any other cono. This led to a monotypic genus Herreanthus being created for it, but these days it is lumped back into Conophytum. There is no problem in cultivation but is very slow to build into substantial clumps.