Astroloba robusta P.Reinecke ex Molteno, Van. Jaarsv. & Gideon F.Sm. (Asphodelaceae: Alooideae) is described as a new species. This species occurs across an extensive geographical distribution range that spans the southern Great Karoo, where it occurs on shale flats and rocky undulating slopes. It is related to, but distinct from, A. foliolosa (Haw.) Uitewaal, which occurs further to the east. Astroloba robusta is immediately distinguished by its unique inflorescence with a robust peduncle, as well as its glossysurfaced leaves with whitish margins and keels, among other characters. It also flowers in winter (May–October, mainly in July and August), while A. foliolosa flowers over summer (August–March, mainly October–January).