Ruschia cupulata (L.Bolus) Schwantes in Z. Sukkulentenk. 3: 106. 1927 Ruschia cupulata (L.Bolus) Schwantes in Z. Sukkulentenk. 3: 106. 1927Taxon for this nameRuschia cupulata (L.Bolus) Schwantes in Z. Sukkulentenk. 3: 106. 1927