Gasteria vlokii

Gasteria vlokii, the Swartberg gasteria, is a succulent plant native to only a few widely separated spots in the Swartberg mountains of the southern Cape, South Africa.

Description
It is most closely related to the species Gasteria glauca, G. ellaphieae and G. nitida. The flowers of all four species are also almost identical. However, it can be distinguished by its smooth, triangular (usually recurved), strap shaped leaves.