A new variety, Astroloba tenax Molteno, Van Jaarsv. & Gideon F.Sm. var. moltenoi Gideon F.Sm. & Van Jaarsv., is described in A. tenax (Asphodelaceae: Alooideae). While in most characters very similar to A. tenax var. tenax, it differs consistently by being a stable, gigantic, nature-based form of the species. This variety, which geographically does not overlap with A. tenax var. tenax, the typical variety, can be easily separated on its size alone. A. tenax var. moltenoi occurs naturally in the south-central Groot Karoo, near Prince Albert in the Western Cape Province, South Africa. The species is illustrated and a map is provided of its geographical distribution range.