We discuss and clarify the nomenclature applicable to five nothospecies widely recognised in Haworthiopsis G.D.Rowley (Asphodelaceae subfam. Alooideae). Four of these nothospecies have basionyms that were originally published in Haworthia Duval by Flavio Resende in Portugal in the mid-1900s, and one has a basionym, also in Haworthia, which was published in Resende's honour by Von Poellnitz. Two new combinations are published: Haworthiopsis ×sampaiana var. broteriana (Resende) Gideon F.Sm. & Vasc.Silva, its basionym being Haworthia broteriana Resende, and Haworthiopsis ×henriquesii (Resende) Gideon F.Sm. & Vasc.Silva, the basionym of which is Haworthia henriquesii Resende.